Fix 4002 strip ansi output

[sripal2013]

Here's the updated version — the only change is the note, which now reflects the full suite actually running here (I kept your two unchecked boxes as-is):

Description

Since v12.x, the Prettier output channel renders raw ANSI escape codes (e.g. [31m[1m) because Prettier's colorized code frames are written as-is and the VS Code Output panel doesn't interpret them.

LoggingService now strips ANSI escape codes through a single private appendLine wrapper, so every log path (messages, error strings, error stacks, logged objects) is covered regardless of where the codes come from.

Related Issue

Fixes #4002

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactoring (no functional changes)
• CI/Build changes

Checklist

• I have read the CONTRIBUTING guidelines
• My code follows the code style of this project (npm run lint passes)
• I have run npm run prettier to format my code
• I have added/updated tests that prove my fix or feature works
• All new and existing tests pass (npm test)
• I have updated the CHANGELOG.md with a summary of my changes

Note: tsc --noEmit, eslint, and prettier all pass. The full npm test suite was run in the real VS Code test host (1.141.0): 61 passing, 12 failing — those 12 failures are pre-existing environment issues, verified identical on the pristine tree (the sandbox blocks network downloads some tests depend on), and are unrelated to this change. Both new tests in src/test/suite/LoggingService.test.ts pass, verified against the exact output sample from the issue.

[sripal2013]

Hi team — bumping this one, open since Oct 7 with all checks passing. It strips ANSI escape codes from syntax-error output in the Output panel (which doesn't interpret them). Let me know if any changes are needed!