feat: restructure as pnpm monorepo with Tauri desktop shell

- Migrate to packages/web + packages/desktop workspace layout via git mv
- Add Tauri v2 desktop shell with @tauri-apps/plugin-http for CORS bypass
- Configure Turborepo with package-level dependsOn build graph
- Add semantic-release with exec plugin for GHA output and disabled PR comments
- Fix http:default capability scope to allow all HTTP/HTTPS origins
- Add Vite Tauri integration (clearScreen, TAURI_DEV_HOST, target, envPrefix)
- Add semantic-release.yml and release.yml GitHub Actions workflows
- Fix all Biome lint errors (noArrayIndexKey, noNonNullAssertion, button types)

.releaserc.json

@@ -0,0 +1,22 @@
+{
+  "branches": ["main"],
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    ["@semantic-release/changelog", {
+      "changelogFile": "CHANGELOG.md"
+    }],
+    ["@semantic-release/git", {
+      "assets": ["CHANGELOG.md", "package.json", "packages/*/package.json"],
+      "message": "chore(release): ${nextRelease.version} [skip ci]\n\n${nextRelease.notes}"
+    }],
+    ["@semantic-release/exec", {
+      "publishCmd": "echo new_release_published=true >> $GITHUB_OUTPUT && echo new_release_version=${nextRelease.version} >> $GITHUB_OUTPUT"
+    }],
+    ["@semantic-release/github", {
+      "assets": [],
+      "successComment": false,
+      "failComment": false
+    }]
+  ]
+}