feat: update Next.js configuration and package dependencies

- Adjusted `reactStrictMode` in `next.config.ts` to reduce strict mode double mounts during development, addressing hydration issues.
- Modified `dev` script in `package.json` to suppress hydration warnings, and added a `dev:strict` script for strict mode development.
- Added new dependencies: `@polar-sh/better-auth` and `@polar-sh/sdk` for enhanced authentication and SDK functionalities.
- Updated `pnpm-lock.yaml` to reflect new package versions and dependencies.

package.json

@@ -3,7 +3,8 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "next dev",
+    "dev": "NEXT_DEV_SUPPRESS_HYDRATION=1 next dev",
+    "dev:strict": "next dev",
     "build": "next build",
     "start": "next start",
     "lint": "eslint"
@@ -14,6 +15,8 @@
     "@dnd-kit/core": "^6.3.1",
     "@dnd-kit/utilities": "^3.2.2",
     "@napi-rs/canvas": "^0.1.97",
+    "@polar-sh/better-auth": "^1.8.3",
+    "@polar-sh/sdk": "^0.46.7",
     "@xyflow/react": "^12.10.1",
     "better-auth": "^1.5.6",
     "class-variance-authority": "^0.7.1",