Organize project files and add session summaries

- Create .temp folder for examples and temporary files
- Update .gitignore to include .temp/ directory
- Move model_comparison_examples.md to .temp folder
- Add session summaries to GEMINI.md for current development work
- Remove obsolete documentation files (IMPROVEMENT_ROADMAP.md, PROJECT_REVIEW_AND_PROPOSALS.md, README.md)
- Maintain clean project structure with proper file organization

.gitignore

@@ -30,6 +30,9 @@ sdk/
 # Ignore custom agents directory
 agents/
 
+# Ignore temporary files and examples
+.temp/
+
 # Ignore Jekyll files
 .nojekyll