chore: publish as torlnk on npm, keep torlink as the brand

The npm name and command become torlnk (npx torlnk) to clear npm's
"too similar to comlink" guard, mirroring the sndcli/soundcli split. torlink
stays the brand everywhere it matters: the logo wordmark, app and terminal
title, version string, the data and downloads folder (APP_NAME), and the repo.
Updates the cli usage lines, readme install commands, and the user-agent
package url to match.

README.md

@@ -11,7 +11,7 @@ torlink is a torrent finder that lives in your terminal, with zero setup and not
 3. **Start it:**
 
    ```sh
-   npx torlink
+   npx torlnk
    ```
 
 That's the only thing you'll type. torlink opens straight to a search bar: search for what you want, paste in a magnet link, or just press Enter on an empty box to browse the curated library. From there it's all keypresses, nothing to memorize, and `?` brings up the full list anytime.
@@ -63,7 +63,7 @@ To run or work on torlink locally:
    Or build it and run the bundled version:
    ```sh
    npm run build
-   npx torlink
+   npx torlnk
    ```
 
 ## Privacy