chore: fix formatting and lint errors across Makefile, backend, and adminfront

This commit addresses several linting and formatting issues that caused CI checks to fail:
- Makefile: Removed obsolete '--organize-imports-enabled' from Biome and switched to '@biomejs/biome'.
- backend: Fixed spacing and alignment issues according to gofmt.
- adminfront: Fixed multiple unused variables and imports, and configured unsafe fixes in the Biome config to remove dead code.

adminfront/src/features/audit/AuditLogsPage.tsx

@@ -3,7 +3,6 @@ import type { AxiosError } from "axios";
 import { Download, NotebookTabs, RefreshCw, Search } from "lucide-react";
 import * as React from "react";
 import {
-  formatAuditValue,
   parseAuditDetails,
   resolveAuditAction,
   resolveAuditActor,