feat: establish root config and workspace foundation

- Create browser-ext placeholder package.json for workspace resolution
- Update root engines to node >=22 matching .nvmrc and web/package.json
- pnpm-workspace.yaml already configured with web and browser-ext
- All legacy directories (packages/, services/, server/) already removed

browser-ext/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "browser-ext",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "build": "echo 'browser-ext build placeholder'",
+    "dev": "echo 'browser-ext dev placeholder'",
+    "test": "echo 'browser-ext test placeholder'"
+  }
+}

package.json

@@ -22,7 +22,7 @@
     "vitest": "^4.1.5"
   },
   "engines": {
-    "node": ">=20.0.0"
+    "node": ">=22.0.0"
   },
   "packageManager": "pnpm@9.0.0"
 }

pnpm-lock.yaml

@@ -24,6 +24,8 @@ importers:
         specifier: ^4.1.5
         version: 4.1.7(@types/node@25.9.1)(@vitest/coverage-v8@4.1.7)(jsdom@29.1.1)(vite@7.3.3(@types/node@25.9.1)(jiti@2.7.0)(lightningcss@1.32.0)(terser@5.48.0))
 
+  browser-ext: {}
+
   web:
     dependencies:
       '@solidjs/meta':