chore: cleanup gitignore and remove stale tracked files

- Remove user-specific files from tracking:
  - .claude/settings.local.json (contains machine-specific paths)
  - backup.json (application state data)
  - logs/server.log (runtime log)
  - test-results/.last-run.json (playwright state)
  - apps/.DS_Store (macOS metadata)
  - apps/app/playwright.config.ts.bak (backup file)

- Add comprehensive gitignore patterns:
  - OS files: .DS_Store, Thumbs.db, Desktop.ini
  - IDE/Editor configs: .vscode/, .idea/, sublime
  - Backup/temp files: *.bak, *.swp, *.tmp, *~
  - Local settings: *.local.json
  - Test artifacts: test-results/, coverage/, .nyc_output/
  - Environment files: .env, .env.local (keeps .example)
  - Build outputs: .turbo/, build/, out/

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.claude/settings.local.json

@@ -1,8 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "Bash(dir \"C:\\Users\\Ben\\Desktop\\appdev\\git\\automaker\\apps\\app\\public\")",
-      "Bash(find:*)"
-    ]
-  }
-}