feat: initial cfdav project with webdav+r2+d1 and pages admin docs

migrations/0002_users.sql

@@ -0,0 +1,9 @@
+-- users table for multi-user auth
+CREATE TABLE IF NOT EXISTS users (
+  id TEXT PRIMARY KEY,
+  email TEXT NOT NULL UNIQUE,
+  password_hash TEXT NOT NULL,
+  created_at TEXT NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_users_email ON users(email);