chore: improve .gitignore for GitHub publishing

Add comprehensive ignore patterns for:
- Test coverage directory
- Editor and IDE files
- Environment files
- Ralph loop local state
- Temporary files

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

.gitignore

@@ -1,4 +1,35 @@
+# Dependencies
 node_modules/
+
+# Build output
 dist/
+
+# Test coverage
+coverage/
+
+# Logs
 *.log
+npm-debug.log*
+
+# OS files
 .DS_Store
+Thumbs.db
+
+# Editor directories
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# State files (local to each machine)
+.claude/ralph-loop.local.md
+
+# Temporary files
+*.tmp
+*.temp