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/istanbul-lib-source-maps/README.md

@@ -0,0 +1,10 @@
+# istanbul-lib-source-maps
+
+[![Build Status](https://img.shields.io/github/actions/workflow/status/istanbuljs/istanbuljs/ci.yml?label=CI&logo=GitHub)](https://github.com/istanbuljs/istanbuljs/actions/workflows/ci.yml)
+
+Source map support for istanbuljs.
+
+## Debugging
+
+`istanbul-lib-source-maps` uses the [debug](https://www.npmjs.com/package/debug) module. Run your application with the environment variable `DEBUG=istanbuljs`, to receive debug
+output.