This PR intends to fix the issues with building codemirror-lang-graphql in Node 22.

The issue is caused by Node 22 dropping the assert keyword for import assertions. We use rollup-plugin-ts as the plugin to parse typescript files, which uses assert keyword inside it.

What's changed

• Move to @rollup/plugin-typescript and remove rollup-plugin-ts and rollup-plugin-dts.
• Update prepare script to also generate declaration file for codemirror-lang-graphql package.

Notes to reviewers

Do make sure the GraphQL syntax highlighting still works and is stable across SH, Web and Desktop across debug and production modes.