fix(drizzle): use ESM-compatible path resolution in vitest config

Replace __dirname with import.meta.url since the package uses
"type": "module".

Author: tobyhede

packages/drizzle/vitest.config.ts

@@ -1,10 +1,10 @@
 import { defineConfig } from 'vitest/config'
-import { resolve } from 'node:path'
+import { fileURLToPath } from 'node:url'
 
 export default defineConfig({
   resolve: {
     alias: {
-      '@cipherstash/drizzle/pg': resolve(__dirname, 'src/pg/index.ts'),
+      '@cipherstash/drizzle/pg': fileURLToPath(new URL('./src/pg/index.ts', import.meta.url)),
     },
   },
 })