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/char-regex/index.d.ts

@@ -0,0 +1,13 @@
+/**
+ * A regex to match any full character, considering weird character ranges.
+ * @example
+ * ```
+ * const charRegex = require("char-regex");
+ *
+ * "❤️👊🏽".match(charRegex());
+ * //=> ["❤️", "👊🏽"]
+ * ```
+*/
+declare function charRegex(): RegExp
+
+export = charRegex