Move documentation to docs folder and update .gitignore

- Created docs/ folder for all internal documentation
- Moved all .md files (except README.md) to docs/
- Updated .gitignore to exclude docs/ folder
- Keeps repository clean for public release

Author: Vipin

.gitignore

@@ -1,14 +1,4 @@
 # Internal Documentation (not for public release)
-ARCHITECTURE.md
-BRANDING.md
-COMPLETION_CHECKLIST.md
-FINAL_IMPLEMENTATION_SUMMARY.md
-FINAL_SUMMARY.md
-IMPLEMENTATION_STATUS.md
-NEXT_STEPS.md
-PRODUCT_PLAN.md
-PROJECT_SUMMARY.md
-TEST_STRATEGY.md
 docs/
 
 # Python