chore: update project state and prepare for image support development

- Add comprehensive image test document with various image types
- Update project structure with development artifacts
- Prepare foundation for image support enhancement phase
- Include test files for validating image editing workflows

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

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

node_modules/y18n/index.mjs

@@ -0,0 +1,8 @@
+import shim from './build/lib/platform-shims/node.js'
+import { y18n as _y18n } from './build/lib/index.js'
+
+const y18n = (opts) => {
+  return _y18n(opts, shim)
+}
+
+export default y18n