docs: Light edits to LS debugging page

Description

This merge request starts on the post-merge review @viktomas asked me to do in #1050 (closed). This MR focuses only on the pages changed in !1090 (merged).

Related Issues

• Related to Polish and document local development and debug... (#1050 - closed)
• Related to feat: implement completion and inlineCompletion... (!1090 - merged) where the work was added.

How has this been tested?

It's docs! (runs away)

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation
• Chore (Related to CI or Packaging to platforms)
• Test gap

Related to #1050 (closed)