gi.ts: Resolve merge conflicts

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• Resolve merge conflicts for current main branch
• Start removing some CommonJS generation stuff
• Removed nodeLinker: node_modules yarn option and fix dependencies (yarn is very strict in what may and may not be imported; indirect dependencies, for example, are not permitted)
• Removed environments, moduleType and package CLI options
  • Environment is always GJS
  • Module type is always ESM
  • and NPM package build is always true now
• Upgrade dependencies

This is just the beginning, in further pull requests I can remove more of the unused stuff