docs: update version range to V1-V5, expand README to match docs site

- Update hero pill and references from V3-V5 to V1-V5
- Expand README from summary to full documentation parity with GitHub Pages site
- Add all 11 rules, 16 commands, hooks, agents, skills, database wrapper, testing, WSL, coding standards
- Add _ai_temp/ to .gitignore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: timclausendev-web

.gitignore

@@ -46,6 +46,9 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 
+# Temporary AI research files
+_ai_temp/
+
 # Misc
 *.bak
 *.tmp