fix: resolve all lint errors, improve type safety, and remove unused code

Remove unused imports, replace `any` types with proper interfaces in directus.ts
and i18n-loader.ts, exclude scripts/ and coverage/ from ESLint, and fix
unused variable warnings across the codebase.

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

app/[locale]/snippets/page.tsx

@@ -1,7 +1,7 @@
 
 import React from "react";
 import { getSnippets } from "@/lib/directus";
-import { Terminal, ArrowLeft, Code } from "lucide-react";
+import { Terminal, ArrowLeft } from "lucide-react";
 import Link from "next/link";
 import SnippetsClient from "./SnippetsClient";