Add PayloadCMS type definitions, Prettier config, and PNPM lockfile

vitest.config.js

@@ -0,0 +1,25 @@
+import path from 'path'
+import { loadEnv } from 'payload/node'
+import { fileURLToPath } from 'url'
+import tsconfigPaths from 'vite-tsconfig-paths'
+import { defineConfig } from 'vitest/config'
+
+const filename = fileURLToPath(import.meta.url)
+const dirname = path.dirname(filename)
+
+export default defineConfig(() => {
+  loadEnv(path.resolve(dirname, './dev'))
+
+  return {
+    plugins: [
+      tsconfigPaths({
+        ignoreConfigErrors: true,
+      }),
+    ],
+    test: {
+      environment: 'node',
+      hookTimeout: 30_000,
+      testTimeout: 30_000,
+    },
+  }
+})