Add support in the Shortcut Guide for Claude Desktop

[Bakorlam]

Description of the new feature / enhancement

Add support in the Shortcut Guide for Claude Desktop.

I tested this manifest myself against a live build of Shortcut Guide with
Claude Desktop focused, confirmed all sections and pinned/recommended
shortcuts render correctly, and caught and fixed a digit-key rendering
issue (bare "1"/"2"/"3" vs. the token convention from #48461) before
opening a PR.

Shortcuts were pulled directly from the app's own in-app "Keyboard
shortcuts" panel (Ctrl+/ inside Claude Desktop). I used Claude
(Anthropic's AI) to help draft the YAML, but I can speak to every entry
in it and will respond to any review feedback directly.

Anthropic.Claude.en-US.yml

Scenario when this would be used?

These shortcuts would show in the Shortcut Guide pane when Claude Desktop
is running and active.

Supporting information

Following the same pattern as the recently merged Postman manifest
#48461 — same YAML
format, added to the existing Manifests folder.

[Bakorlam]

[htcfreek]

@Bakorlam
Not sure if you saw it in the contribution request issue: You got a 👍/go for it for your implementation request.

Feel free to open a PR and thank you for your work on this. If you have any further questions don't worry to ask them.

---

Btw opening issues for the other suggested manifests is always a good idea. Then we can individually decide and about the implementation.

[Bakorlam]

Thanks for the heads up and the go-ahead! Opening the PR now. I'll get
issues filed for the other three, per your suggestion.