PoC: Type4Py server integration

[elatoskinas]

Integrates the Type4Py inference server component to the extension.

• Logic to send API request after triggering a command for a target file. Requests are sent using the added axios dependency
• Add type hierarchy for response data
• Transformation of response to extension-friendly format
• Integration of Type4Py data
• Added sample test Python files to try extension on

Future work:

• Update README
• Functions within classes are not yet supported, will require transformation logic changes from API response to the extension data structure
• Variable annotations are not supported by the forked extension. Will need to add new logic to pattern-match on variables in the file and then hook-up the inference data map to integrate the feature
  • Module-level
  • Function-level
  • Class-level
• No return type: Add None annotation suggestion
• Do not send a request to the server for files larger than 1K LoC.
• Exception handling can be improved
• Cleaning up the repo of unneeded forked functionality
• Add setting to enable tc?
• Handle new server return format (response and error)
• Refactor (group/split into files) & improve docs

• Edge cases: Out of scope in this PR, documented in VSCode Type Extension: Edge Cases #4
• Unit/Integration tests: Moved to issue Unit/Integration Tests #5

[mir-am]

Overall, LGTM. We'll discuss more implementation details and current issues in our meeting.

[mir-am]

Let's merge this!