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/exit-x/test/fixtures/log-broken.js

@@ -0,0 +1,23 @@
+var errorCode = process.argv[2];
+var max = process.argv[3];
+var modes = process.argv.slice(4);
+
+function stdout(message) {
+  if (modes.indexOf('stdout') === -1) { return; }
+  process.stdout.write('stdout ' + message + '\n');
+}
+
+function stderr(message) {
+  if (modes.indexOf('stderr') === -1) { return; }
+  process.stderr.write('stderr ' + message + '\n');
+}
+
+for (var i = 0; i < max; i++) {
+  stdout(i);
+  stderr(i);
+}
+
+process.exit(errorCode);
+
+stdout('fail');
+stderr('fail');