chore: Remove Claude AI development files from repository

Removed files only needed for Claude AI development workflow:
- CLAUDE.md - AI context documentation (not needed to run app)
- .claude/settings.local.json - Claude Code CLI settings

Added to .gitignore:
- .claude/ - Claude Code CLI configuration directory
- CLAUDE.md - AI context file

These files are kept locally for development but excluded from repository.
Application does not require these files to function.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -56,10 +56,14 @@ jspm_packages/
 # IDE files
 .vscode/
 .idea/
+.claude/
 *.swp
 *.swo
 *~
 
+# AI context files
+CLAUDE.md
+
 # OS generated files
 .DS_Store
 .DS_Store?