docs: recommend the extension via .vscode/extensions.json

[kevinswiber]

Idea

Repositories that use Pointbreak should be able to ship a .vscode/extensions.json workspace recommendation for pointbreak.pointbreak, turning extension onboarding from "discover the tool" into "the project recommends it." Nothing in extensions/vscode or the docs mentions this pattern today.

Shape

Docs-level change:

• Document the recommended .vscode/extensions.json snippet in the extension README / onboarding docs.
• Consider shipping the recommendation in this repository's own .vscode/extensions.json as the working example.

Note

The editor surface is under active reassessment; placement of this guidance may shift with that outcome. The change itself stays small either way.