feat: display logs for finished CI jobs

Part of #423 (closed)

Contains code from the ANSI Colors extension for VS Code by Ilia Pozdnyakov.

This allows for displaying traces of finished CI jobs in VS Code, with the following features:

• Filtering of control sequences
• Full ANSI colors
• Folding of sections
• A separate button for saving the raw job trace (since saving this document directly would not preserve color/folding information)

Current Merge Request status:

• This branch still has a lot of code from the ANSI Colors extension that's aimed towards updating a document that is being edited. We only need to allow for appending new data (in a future MR).
• Multiple lint errors are currently suppressed, some of which should be fixed properly.
• There are no unit tests, until the scope of this MR is finalized.