feat: AI-powered TypeScript migration framework with parallel processing (#35045)

Co-authored-by: Claude <[email protected]>
Co-authored-by: Mehmet Salih Yavuz <[email protected]>
Co-authored-by: Elizabeth Thompson <[email protected]>

Author: 4 people

.claude/commands/js-to-ts.md

@@ -0,0 +1,10 @@
+# JavaScript to TypeScript Migration Command
+
+## Usage
+```
+/js-to-ts <core-filename>
+```
+- `<core-filename>` - Path to CORE file relative to `superset-frontend/` (e.g., `src/utils/common.js`, `src/middleware/loggerMiddleware.js`)
+
+## Agent Instructions
+**See:** [../projects/js-to-ts/AGENT.md](../projects/js-to-ts/AGENT.md) for complete migration guide.