fix: manual table creation starts with 1 row, 1 column

Manual tables now create with a single 'name' column and 1 row instead
of 2 columns and 20 rows. Copilot tables remain at 0 rows, 0 columns.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/sim/app/workspace/[workspaceId]/tables/tables.tsx

@@ -147,12 +147,9 @@ export function Tables() {
       const result = await createTable.mutateAsync({
         name,
         schema: {
-          columns: [
-            { name: 'name', type: 'string' },
-            { name: 'status', type: 'string' },
-          ],
+          columns: [{ name: 'name', type: 'string' }],
         },
-        initialRowCount: 20,
+        initialRowCount: 1,
       })
       const tableId = result?.data?.table?.id
       if (tableId) {