chore: update .gitignore and remove quick insert options from button configurations

- Added new entries to .gitignore for multi-agent MCP task queue and related rules.
- Removed "즉시 저장" (quick insert) options from the ScreenSettingModal and BasicTab components to streamline button configurations.
- Cleaned up unused event options in the V2ButtonConfigPanel to enhance clarity and maintainability.

These changes aim to improve project organization and simplify the user interface by eliminating redundant options.

frontend/lib/registry/components/simple-repeater-table/SimpleRepeaterTableComponent.tsx

@@ -448,7 +448,8 @@ export function SimpleRepeaterTableComponent({
         } else if (col.type === "number") {
           newRow[col.field] = 0;
         } else if (col.type === "date") {
-          newRow[col.field] = new Date().toISOString().split("T")[0];
+          const _n = new Date();
+          newRow[col.field] = `${_n.getFullYear()}-${String(_n.getMonth() + 1).padStart(2, "0")}-${String(_n.getDate()).padStart(2, "0")}`;
         } else {
           newRow[col.field] = "";
         }