feat: Introduce a new mail package for email templates and update the gatekeeper login page with new logo assets.

packages/mail/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "@mintel/mail",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": "./src/index.ts",
+    "./templates/*": "./src/templates/*"
+  },
+  "scripts": {
+    "build": "tsup src/index.ts --format esm --dts",
+    "dev": "tsup src/index.ts --format esm --watch",
+    "lint": "eslint src",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@react-email/components": "^0.0.33",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "@mintel/eslint-config": "workspace:*",
+    "@mintel/tsconfig": "workspace:*",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
+    "tsup": "^8.3.5",
+    "typescript": "^5.0.0",
+    "vitest": "^3.0.4"
+  }
+}