feat(metagen): client_ts

[Yohe-Am]

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• Implements client_ts as described in #777 .

Migration notes

...

• [x] The change comes with new or modified tests
• [x] Hard-to-understand functions have explanatory comments
• [ ] End-user documentation is updated to reflect the change

Summary by CodeRabbit

• Bug Fixes

  • Improved error handling in typegraph function to provide better error messages.

• Chores

  • Updated Docker image references to use docker.io prefix for consistency.
  • Excluded unnecessary files from the VSCode settings.
  • Enhanced configurability of Docker commands in development tasks.

• New Features

  • Introduced new module and methods for TypeScript code generation in the metagen library, including structures, rendering functions, and error handling macros.
  • Added root method to the Typegraph module for accessing the type graph's root node.
  • Added test_typegraph_3 function for improved testing capabilities.