chore: add .playwright-mcp/ to gitignore and commit icon variants

- Added .playwright-mcp/ directory to .gitignore (Playwright screenshots)
- Updated footer-icon.png and spec-coding-logo.png
- Added backup and variant images for testing different icon styles:
  - footer-icon.png.bak
  - spec-coding-logo-braces.png
  - spec-coding-logo-slash.png
  - apple-touch-icon.png.bak

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

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

Author: tonykay

.gitignore

@@ -5,3 +5,4 @@ hugo.darwin
 node_modules/
 .hugo_build.lock
 .vscode/
+.playwright-mcp/