feat: add candidate SQL table presets and script-building composable

src/composables/sqlTable.ts

@@ -0,0 +1,15 @@
+import { ref } from "vue"
+import { defaultSqlTableId, sqlTables } from "../data/sqlTables"
+
+export const selectedTableId = ref(defaultSqlTableId)
+
+export function resetSqlTableSelection() {
+  selectedTableId.value = defaultSqlTableId
+}
+
+export function buildSqlScript(studentSql: string) {
+  const table =
+    sqlTables.find((item) => item.id === selectedTableId.value) ??
+    sqlTables[0]
+  return `${table.setupSql}\n\n${studentSql}\n\nSELECT * FROM ${table.tableName};`
+}