Add basic column selection

src/app/duckdb.service.ts

@@ -5,6 +5,7 @@ import { z } from 'zod';
 export const Column = z.object({
   name: z.string(),
   type: z.string(),
+  enabled: z.boolean().default(true),
 });
 
 export const SortColumn = z.object({
@@ -142,6 +143,7 @@ export class DuckdbService {
         cols.push({
           name: jsonData['column_name'],
           type: jsonData['column_type'],
+          enabled: true,
         });
       }
       return cols;