docs: update model references and add missing GPT-5 and Gemini 2.0 models

- Add missing models to all tool parameter documentation
- Update model table in advanced-usage.md with GPT-5 series
- Add Gemini 2.0 Flash and Flash Lite models
- Include detailed capabilities for each model variant
- Fix model parameter consistency across all tool docs

Models added:
- GPT-5 (gpt5): Advanced reasoning with 400K context
- GPT-5 Mini (gpt5-mini): Efficient variant
- GPT-5 Nano (gpt5-nano): Fast, low-cost variant
- Gemini 2.0 Flash (flash-2.0): Audio/video support
- Gemini 2.0 Flash Lite (flashlite): Text-only lightweight

docs/tools/precommit.md

@@ -135,7 +135,7 @@ Use zen and perform a thorough precommit ensuring there aren't any new regressio
 **Initial Configuration (used in step 1):**
 - `path`: Starting directory to search for repos (default: current directory, absolute path required)
 - `prompt`: The original user request description for the changes (required for context)
-- `model`: auto|pro|flash|o3|o3-mini|o4-mini|gpt4.1 (default: server default)
+- `model`: auto|pro|flash|flash-2.0|flashlite|o3|o3-mini|o4-mini|gpt4.1|gpt5|gpt5-mini|gpt5-nano (default: server default)
 - `compare_to`: Compare against a branch/tag instead of local changes (optional)
 - `severity_filter`: critical|high|medium|low|all (default: all)
 - `include_staged`: Include staged changes in the review (default: true)