Jni migration

[sirknightj]

Issue #, if available:

• N/A

Description of changes:

• Moving JNI from the CPP repo to this repo. It makes more sense to be in this repo since:
  • The JNI does not depend on the CPP producer SDK at all
  • The JNI interfaces is tightly coupled with the Java Producer SDK interfaces, updates to any method signatures or PIC structs need to happen in both places at the same time.
  • This should make it easier to keep track of which JNI version should be used with which Producer Java version
• Kept the Git commit history for the JNI.
• Deleted all the unused stuff in the CMakeLists.txt

Other changes added:

• Adjusted the CI to use this one rather than the other one.
• Added clean-all target (cmake --build . --target clean-all) so we can clean up both the build folder and the dependency folder (where PIC gets cloned).
• Added dependency folder to the gitignore.
• Adjusted the error message for the Java not found:

Before

CMake Error at /opt/homebrew/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:227 (message):
  Could NOT find JNI (missing: JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 AWT)
Call Stack (most recent call first):
  /opt/homebrew/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:591 (_FPHSA_FAILURE_MESSAGE)
  /opt/homebrew/share/cmake/Modules/FindJNI.cmake:590 (find_package_handle_standard_args)
  CMakeLists.txt:204 (find_package)

After

Java Development Kit (JDK) not found!
Please ensure that:
  1. JDK is installed
  2. JAVA_HOME environment variable is set correctly
  3. Your JDK installation includes JNI headers

Next steps (future PR):

• Have GitHub actions commit the updated JNI files and push to the branch.

What was changed?

• See the above

Why was it changed?

• See the above

How was it changed?

• See the above

What testing was done for the changes?

• Tested the updated CI on a forked environment.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.82%. Comparing base (743073b) to head (43b9bd3).

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #212   +/-   ##
==========================================
  Coverage      40.82%   40.82%           
  Complexity       407      407           
==========================================
  Files            103      103           
  Lines           3723     3723           
  Branches         230      230           
==========================================
  Hits            1520     1520           
  Misses          2085     2085           
  Partials         118      118           

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