Dashboard: Migrate engine/access-tokens page from chakra to tailwind (#7714)

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## PR-Codex overview
This PR focuses on refactoring components in the `Engine` section of the dashboard, enhancing UI elements, and improving error handling for access tokens and keypairs management.

### Detailed summary
- Replaced `Modal` components with `Dialog` components for improved UI consistency.
- Enhanced error handling using `toast` notifications.
- Updated button components for better visual consistency.
- Refactored `AddAccessTokenButton`, `KeypairsTable`, and `AccessTokensTable` components for cleaner code.
- Simplified state management for modal visibility.
- Improved accessibility and user experience in forms and alerts.
- Updated various imports to use new UI components from the design system.

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Author: MananTank

apps/dashboard/src/app/(app)/team/[team_slug]/[project_slug]/(sidebar)/engine/dedicated/(general)/import/EngineImportPage.tsx

@@ -1,6 +1,5 @@
 "use client";
 
-import { FormControl } from "@chakra-ui/react";
 import { zodResolver } from "@hookform/resolvers/zod";
 import { useMutation } from "@tanstack/react-query";
 import { CircleAlertIcon, DownloadIcon, ExternalLinkIcon } from "lucide-react";
@@ -12,6 +11,7 @@ import { apiServerProxy } from "@/actions/proxies";
 import { Button } from "@/components/ui/button";
 import {
   Form,
+  FormControl,
   FormField,
   FormItem,
   FormLabel,