make login/register pages work, get rid of database.db, and remove

references

src/lib/server/db/schema.ts

@@ -4,6 +4,7 @@ export const user = sqliteTable('user', {
 	id: text('id').primaryKey(),
 	age: integer('age'),
 	username: text('username').notNull().unique(),
+	email: text('email').notNull().unique(),
 	passwordHash: text('password_hash').notNull()
 });