feat(gatsby): Initial GraphQL Typegen Implementation

[LekoArts]

Description

Initial PR for #35420.

Work to be done:

• Only TypeScript support
• Support for gatsby-node.ts (also in local plugins)
• Generate graphql.config.json configuration for GraphQL language server
• Generate config, schema, types on initial start of development server (at the end to not slow down startup time)
• Re-Generate schema and types through hot-reloading in gatsby develop
• Add initial E2E tests

Documentation

In one of the later PRs a new documentation page should be added with more information about this. Not in this PR though.

Related Issues

#35420

[ch49660]
[ch49658]