Update vsce version to latest 2.x and use newer vscode scoped package

[awharn]

What It Does

Update vsce dependency to use @vscode/vsce and use latest 2.x version

How to Test

Review Checklist I certify that I have:

• [x] tested my changes
• [ ] added/updated automated tests
• [ ] updated the changelog
• [x] followed the contribution guidelines

Additional Comments

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.17%. Comparing base (fba006e) to head (aa261ca). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #150 +/- ## ======================================= Coverage 93.17% 93.17% ======================================= Files 73 73 Lines 718 718 Branches 54 55 +1 ======================================= Hits 669 669 Misses 49 49 ```

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