Fix some Toolshed 2.0 development paper-cuts

[davelopez]

I found some things that drifted away since the last time this was working.

• Added a server proxy entry to vite.config.ts to point to the development backend URL make run_test_backend.
  • For some reason, in my local setup, only GraphQL could connect to the real backend (localhost:9009), while the API calls tried to connect to localhost:4040 resulting in 404.
• Fix an import issue in scripts/bootstrap_test_shed.py introduced inadvertently in a mass refactor.

Still, I can't get scripts/bootstrap_test_shed.py to run through in my local setup. There seem to be some missing test files and other development environment-dependent issues around it but it is not critical. It would be cool to have it though 😄

How to test the changes?

• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  • Open a couple of terminals in galaxy/lib/tool_shed/webapp/frontend
  • Start the test server:
    • Run make run_test_backend
      • This successfully starts the server at http://127.0.0.1:9009/
  • Start the frontend in dev mode:
    • Run make dev
      • This starts the client at http://localhost:4040/

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[davelopez]

Thanks for the quick review John!