feat: Implement comprehensive JLine Curses TUI library with focus indicators and repaint system

This commit implements a complete Terminal User Interface (TUI) library for JLine with:

## 🎯 Core TUI Components
- **Essential Components**: List, Table, Tree, Input, Label, Button, TextArea
- **Layout Containers**: Box, Window, Panel for organizing components
- **Interactive Demo**: Complete CursesDemo showcasing all functionality

## 🎨 Visual Focus System
- **Focus Indicators**: Yellow borders and titles for focused components
- **Theme Integration**: Consistent styling through DefaultTheme
- **Visual Feedback**: Clear indication of which component has focus

## ⚡ Smart Repaint System
- **Invalidation API**: Components automatically invalidate on state changes
- **Efficient Updates**: Only invalid components are redrawn
- **Focus-Aware**: Automatic invalidation on focus changes
- **Performance**: Minimal screen updates for optimal performance

## ⌨️ Advanced Input Handling
- **KeyEvent System**: Comprehensive key event processing
- **Keyboard Navigation**: Arrow keys, Tab, Enter, Escape support
- **Modifier Keys**: Ctrl, Alt, Shift detection and handling
- **Shortcut System**: Configurable keyboard shortcuts

## 🧪 Quality Assurance
- **Comprehensive Tests**: 368+ tests across all modules
- **Virtual Screen Testing**: Mock screen for component testing
- **Integration Tests**: End-to-end functionality verification
- **Code Quality**: Spotless formatting and clean architecture

## 📦 Additional Features
- **POSIX Commands**: Comprehensive POSIX command implementation
- **Build System**: Clean Maven build with proper dependency management
- **Documentation**: Updated module documentation and examples

The implementation follows TUI best practices from libraries like Ratatui and Cursive,
providing a modern, efficient, and user-friendly terminal interface experience.

Author: gnodet

build

@@ -65,6 +65,7 @@ function command_demo() {
     echo "  repl      - Run the REPL demo"
     echo "  password  - Run the password demo"
     echo "  consoleui - Run the ConsoleUI demo"
+    echo "  curses    - Run the interactive Curses demo"
     echo "Options:"
     echo "  --help       Show help message"
     echo "  debug        Enable remote debugging"
@@ -132,6 +133,13 @@ function command_demo() {
       fi
       MAIN_CLASS="org.jline.demo.consoleui.BasicDynamic"
       ;;
+    "curses")
+      # Add curses jar
+      if [ -d ${TARGETDIR}/lib ]; then
+        cp=${cp}$(find ${TARGETDIR}/lib -name "jline-curses-*.jar" -exec printf :{} ';')
+      fi
+      MAIN_CLASS="org.jline.demo.CursesDemo"
+      ;;
     *)
       echo "Unknown demo type: $demo_type"
       exit 1
@@ -185,6 +193,26 @@ function command_demo() {
           echo ""
           echo "Note: On Windows, either Jansi or JNA library must be included in classpath."
           echo "To test with a dumb terminal, use: TERM=dumb $basename demo consoleui"
+        elif [ "$demo_type" = "curses" ]; then
+          echo "Usage: $basename demo curses [options]"
+          echo "Options:"
+          echo "  --help       Show this help message"
+          echo "  debug        Enable remote debugging"
+          echo "  debugs       Enable remote debugging with suspend"
+          echo "  jansi        Add Jansi support (recommended for Windows)"
+          echo "  jna          Add JNA support (alternative for Windows)"
+          echo "  verbose      Enable verbose logging"
+          echo "  ffm          Enable Foreign Function Memory (preview)"
+          echo ""
+          echo "Interactive demo showcasing Phase 2 curses enhancements:"
+          echo "  • Enhanced Input component with text selection and validation"
+          echo "  • Advanced List component with multiple selection"
+          echo "  • Rich TextArea component with multi-line editing"
+          echo "  • Dynamic Table component with sorting and filtering"
+          echo "  • Interactive Tree component with expandable nodes"
+          echo ""
+          echo "Note: This demo requires a real terminal to work properly."
+          echo "To test with a dumb terminal, use: TERM=dumb $basename demo curses"
         else
           echo "Usage: $basename demo $demo_type [options]"
           echo "Options:"

build.bat

@@ -58,6 +58,7 @@ if "%demo_type%"=="" (
     echo   repl      - Run the REPL demo
     echo   password  - Run the password demo
     echo   consoleui - Run the ConsoleUI demo
+    echo   curses    - Run the interactive Curses demo
     echo Options:
     echo   --help       Show help message
     echo   debug        Enable remote debugging
@@ -135,6 +136,14 @@ if "%demo_type%"=="gogo" (
         )
     )
     set "MAIN_CLASS=org.jline.demo.consoleui.BasicDynamic"
+) else if "%demo_type%"=="curses" (
+    :: Add curses jar
+    if exist "%TARGETDIR%\lib" (
+        for /f "tokens=*" %%i in ('dir /b /s "%TARGETDIR%\lib\jline-curses-*.jar"') do (
+            set "cp=!cp!;%%i"
+        )
+    )
+    set "MAIN_CLASS=org.jline.demo.CursesDemo"
 ) else (
     echo Unknown demo type: %demo_type%
     exit /b 1
@@ -188,6 +197,26 @@ if "%~1"=="--help" (
         echo.
         echo Note: On Windows, either Jansi or JNA library must be included in classpath.
         echo To test with a dumb terminal, use: set TERM=dumb ^& %~n0 demo consoleui
+    ) else if "%demo_type%"=="curses" (
+        echo Usage: %~n0 demo curses [options]
+        echo Options:
+        echo   --help       Show this help message
+        echo   debug        Enable remote debugging
+        echo   debugs       Enable remote debugging with suspend
+        echo   jansi        Add Jansi support ^(recommended for Windows^)
+        echo   jna          Add JNA support ^(alternative for Windows^)
+        echo   verbose      Enable verbose logging
+        echo   ffm          Enable Foreign Function Memory ^(preview^)
+        echo.
+        echo Interactive demo showcasing Phase 2 curses enhancements:
+        echo   • Enhanced Input component with text selection and validation
+        echo   • Advanced List component with multiple selection
+        echo   • Rich TextArea component with multi-line editing
+        echo   • Dynamic Table component with sorting and filtering
+        echo   • Interactive Tree component with expandable nodes
+        echo.
+        echo Note: This demo requires a real terminal to work properly.
+        echo To test with a dumb terminal, use: set TERM=dumb ^& %~n0 demo curses
     ) else (
         echo Usage: %~n0 demo %demo_type% [options]
         echo Options: