Convert project from Typescript to Javascript (short)

This is just a draft.

1. convert types from ts files with ChatGPT. paste into corresponding js files
2. launch ts-to-jsdoc on the source files directory
3. delete tsconfig.json, typescript packages
4. run eslint
5. also use Webstorm code inspection to find errors
6. use regexpr replace from the IDE
7. to rename files, use find+exec+rename