feat(FN-1472): add responsive terminal layout for TUI

- Add ResponsiveLayout component with dynamic row/column splitting based on terminal size
- Create terminal utility for detecting terminal dimensions and layout preferences
- Add truncate utility for smart text truncation with min/max bounds
- Implement comprehensive responsive layout tests with all breakpoints
- Update TUI exports to expose new layout and utility components
- Enhance README documentation with responsive layout guide and examples

packages/tui/src/components/index.ts

@@ -14,3 +14,13 @@ export {
   type ScreenRouterProps,
   type ScreenComponentProps,
 } from "./screen-router.js";
+
+export {
+  ResponsiveHeader,
+  ResponsiveTable,
+  ResponsiveTaskRow,
+  ResponsiveStatusBar,
+  type TableColumn,
+  type ResponsiveTableProps,
+  type ResponsiveTaskRowProps,
+} from "./responsive-layout.js";