feat: integrate payload cms to landing page (#25)

* feat: integrate payload cms to landing page

* feat: add payload configuration and update TypeScript target

* fix: update TypeScript paths for payload configuration

* refactor: update config import paths to use local payload.config

* fix: update quotation marks for testimonials to use HTML entities

* fix: include withPayload in Next.js plugins for proper configuration

apps/landing/src/payload.config.ts

@@ -0,0 +1,40 @@
+import { postgresAdapter } from '@payloadcms/db-postgres';
+import { lexicalEditor } from '@payloadcms/richtext-lexical';
+import path from 'path';
+import { buildConfig } from 'payload';
+import sharp from 'sharp';
+import { fileURLToPath } from 'url';
+
+import { Media } from './collections/Media';
+import { Users } from './collections/Users';
+
+const filename = fileURLToPath(import.meta.url);
+const dirname = path.dirname(filename);
+
+export default buildConfig({
+  admin: {
+    user: Users.slug,
+    importMap: {
+      importMapFile: path.resolve(
+        __dirname,
+        'app',
+        '(payload)',
+        'admin',
+        'importMap.js'
+      ),
+    },
+  },
+  collections: [Users, Media],
+  editor: lexicalEditor(),
+  secret: process.env.CMS_SECRET || '',
+  typescript: {
+    outputFile: path.resolve(dirname, 'payload-types.ts'),
+  },
+  db: postgresAdapter({
+    pool: {
+      connectionString: process.env.CMS_POSTGRES_URL || '',
+    },
+  }),
+  sharp,
+  plugins: [],
+});