declare tea as a release binary

The dependency this plugin actually wants, and the reason the platform grew
release dependencies: tea is not in any distribution, and Debian has an
unrelated package of that name — a graphical text editor. `packages` is empty
on purpose, because every entry in it would install the wrong program.

`identify` runs `tea --version` and looks for `go-sdk`, which Gitea's CLI
prints and the text editor does not. Bun.which cannot tell them apart, and a
namesake reported as satisfied is worse than one reported missing.

Pinned at 0.15.1 rather than latest: an install that silently fetches whatever
is current is not reproducible.

manifest.ts

@@ -48,6 +48,24 @@ export const manifest: PluginManifest = {
 
   unauthenticatedPaths: ['/_web/*'],
 
+  // `tea` is not in any distribution, and Debian has an UNRELATED package of that name — a graphical
+  // text editor. So this is a release binary with an identity check: `Bun.which('tea')` cannot tell the
+  // two apart, and reporting the wrong one as satisfied is worse than reporting it missing.
+  osDependencies: [
+    {
+      binary: 'tea',
+      reason: 'Pull requests, issues and comments. Plain git handles clones and pushes without it.',
+      // Empty on purpose. Every entry here would install the text editor.
+      packages: {},
+      release: {
+        url: 'https://dl.gitea.com/tea/0.15.1/tea-0.15.1-{os}-{arch}',
+        // Gitea's tea prints `Version: 0.9.2  golang: …  go-sdk: …`. The text editor prints nothing of
+        // the sort, and `go-sdk` is the least likely of those to appear in an unrelated tool.
+        identify: { args: ['--version'], contains: 'go-sdk' },
+      },
+    },
+  ],
+
   permissions: [
     {
       key: 'gitea',