feat(desktop): embed BoosAPI Desktop client as a subproject

Vendor the rebranded BoosAPI Desktop client (Tauri + Vue) into metapi as
a monorepo subdirectory under desktop/. Source only — node_modules,
dist, Cargo target and the upstream .git history are excluded.

desktop/ keeps its own independent Cargo workspace (desktop/src-tauri
with crates/*); it is not part of the backend boosapi crate, so a
`cargo check` at the metapi root still compiles only the backend. Build
the desktop app from desktop/src-tauri per desktop/README.md.

Note: app icons are still placeholder assets pending the final BoosAPI
logo. The updater signing keys live outside the repo and are not
included.

desktop/libs/stream-monaco/.github/workflows/release.yml

@@ -0,0 +1,44 @@
+name: Release
+
+permissions:
+  id-token: write
+  contents: write
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+          cache: pnpm
+          registry-url: https://registry.npmjs.org/
+
+      - run: corepack enable
+
+      - run: pnpm install --frozen-lockfile
+
+      - run: pnpm build
+
+      - run: pnpm vitest run
+
+      - run: pnpm typecheck
+
+      - run: pnpm dlx changelogithub
+        env:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+
+      - run: pnpm publish --no-git-checks --access public
+        if: ${{ secrets.NPM_TOKEN != '' }}
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}
+          NPM_CONFIG_PROVENANCE: true