feat(sqlc): scaffold sqlc config and placeholder queries

internal/user/sqlc/users.sql.go

@@ -0,0 +1,21 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: users.sql
+
+package usersqlc
+
+import (
+	"context"
+)
+
+const ping = `-- name: Ping :one
+SELECT 1::int AS ok
+`
+
+func (q *Queries) Ping(ctx context.Context) (int32, error) {
+	row := q.db.QueryRow(ctx, ping)
+	var ok int32
+	err := row.Scan(&ok)
+	return ok, err
+}