feat: add auth and database foundation

.env.example

@@ -0,0 +1,9 @@
+# Drizzle
+DATABASE_URL=file:local.db
+
+ORIGIN=""
+
+# Better Auth
+# For production use 32 characters and generated with high entropy
+# https://www.better-auth.com/docs/installation
+BETTER_AUTH_SECRET=""