Feature: Auto-detect template capabilities (supports_disable_thinking, supports_reasoning_only, etc.)

[ochafik]

Feature Request

Minja should auto-detect and expose template capabilities that currently need to be manually specified in test harnesses.

New Capabilities to Detect

Thinking Mode Control

• supports_disable_thinking - Can the template respect enable_thinking=false?
  • DeepSeek V3.1: Always emits thinking blocks (doesn't support disabling)
  • Command R7B, GLM-4.6, SmolLM3-3B: Respect enable_thinking

Reasoning Format Variations

• supports_reasoning_only - Can the template emit reasoning without any content or tool calls?
• supports_reasoning_with_content - Can the template mix content text with reasoning in the same message?
  • Apertus: Cannot mix text content with reasoning blocks

Tool Call Behavior

• tool_required_allows_content - When tool_choice=required, can content appear before tool calls?
• tools_emit_content_with_calls - Can content appear alongside tool calls in the same message?
• reasoning_requires_tools - Does reasoning only appear when tools are also present?
  • Command R7B: reasoning_requires_tools = true - reasoning only appears with tool calls
  • DeepSeek R1/V3.1, GLM-4.6: reasoning_requires_tools = false - reasoning can appear independently