Update model family handling in getModelFamily function to use official method to determine user selected model

[tspascoal]

This pull request includes updates to the package.json file and modifications to the getModelFamily function and its associated tests in src/parrotchathandler.ts and src/test/parrotchathandler.test.ts.

Version Update:

• package.json: Updated the package version from 0.0.10 to 0.0.11.

Function Refactoring:

• src/parrotchathandler.ts: Refactored the getModelFamily function to use the vscode.ChatRequest type and updated the logic to check for model instead of userSelectedModel.

Test Suite Improvements:

• src/test/parrotchathandler.test.ts: Refactored tests for getModelFamily by introducing a getMockedRequest helper function to create mock requests, and updated tests to use this helper function. Removed outdated tests related to userSelectedModel.

[github-actions]

Tests

20 tests   - 4   20 ✅  - 4   0s ⏱️ ±0s
 7 suites  - 1    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit 091ff15. ± Comparison against base commit d498884.

This pull request removes 4 tests.

Returns default model family if user selected model is not present ‑ getModelFamily Test Suite Returns default model family if user selected model is not present
Returns default model family if user selected model is undefined ‑ getModelFamily Test Suite Returns default model family if user selected model is undefined
Returns default model family if userSelectedModel is null ‑ getModelFamily Test Suite Returns default model family if userSelectedModel is null
Returns user selected model family if userSelectedModel.family is a non-empty string ‑ getModelFamily Test Suite Returns user selected model family if userSelectedModel.family is a non-empty string