chore: add biome for code formatting only

- Add @biomejs/biome 1.9.4 as devDependency
- Configure biome.json with formatting rules only (linting disabled)
- Set up formatting preferences: 2 spaces, single quotes, ES5 trailing commas
- Enable import organization
- Ignore dist directories and generated type files

Author: charislam

biome.json

@@ -0,0 +1,31 @@
+{
+  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
+  "vcs": {
+    "enabled": false,
+    "clientKind": "git",
+    "useIgnoreFile": false
+  },
+  "files": {
+    "ignoreUnknown": false,
+    "ignore": [
+      "**/dist",
+      "packages/mcp-server-supabase/src/management-api/types.ts"
+    ]
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space"
+  },
+  "organizeImports": {
+    "enabled": true
+  },
+  "linter": {
+    "enabled": false
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "single",
+      "trailingCommas": "es5"
+    }
+  }
+}

package-lock.json

@@ -1,13 +1,14 @@
 {
-  "workspaces": [
-    "packages/*"
-  ],
+  "workspaces": ["packages/*"],
   "scripts": {
     "build": "npm run build --workspace @supabase/mcp-utils --workspace @supabase/mcp-server-supabase",
     "test": "npm run test --workspace @supabase/mcp-utils --workspace @supabase/mcp-server-supabase",
-    "test:coverage": "npm run test:coverage --workspace @supabase/mcp-server-supabase"
+    "test:coverage": "npm run test:coverage --workspace @supabase/mcp-server-supabase",
+    "format": "biome check --write .",
+    "format:check": "biome check ."
   },
   "devDependencies": {
+    "@biomejs/biome": "1.9.4",
     "supabase": "^2.1.1"
   }
 }