feat(VSCode): pass highlighted content as model context

[Githubguy132010]

Fixes #401

Context

This PR adds VS Code support for passing the currently highlighted editor content as focused model context when sending a chat/edit message. This addresses #401 and helps the model focus on the exact block a user is asking about.

Implementation

• Added editorContextUrl() in packages/kilo-vscode/src/editor-context.ts.
• The helper converts the active editor selection into file://...?...start=<line>&end=<line> query params.
• Updated KiloProvider to use that helper when injecting active editor file context.
• Kept previous behavior for empty selection (full file URL without range params).
• Added targeted unit tests for URL generation edge cases:
  • empty selection
  • normal multi-line selection
  • reversed selection direction
  • line-boundary selection ending at column 0

Screenshots

before	after
N/A (context payload change)	N/A (context payload change)

How to Test

• Open VS Code with the Kilo extension and any code file.
• Highlight a block of code and send a prompt (for example: what does this code block do?).
• Confirm model responses are focused on the selected block.
• Repeat with no selection and confirm normal full-file context behavior.
• Automated checks run in this branch:
  • bun run --cwd packages/kilo-vscode check-types
  • bun test tests/unit/editor-context.test.ts (from packages/kilo-vscode/)

Get in Touch

thomas07374

[github-actions]

Hey! Your PR title [FEATURE] VSCode: pass highlighted content as model context (#401) doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, kilo).

See CONTRIBUTING.md for details.