chore: overhaul infrastructure and integrate @mintel packages

- Restructure to pnpm monorepo (site moved to apps/web)
- Integrate @mintel/tsconfig, @mintel/eslint-config, @mintel/husky-config
- Implement Docker service architecture (Varnish, Directus, Gatekeeper)
- Setup environment-aware Gitea Actions deployment

eslint.config.js

@@ -1,22 +0,0 @@
-/** @type {import('eslint').Linter.FlatConfig[]} */
-export default [
-  {
-    ignores: ['dist/**', '.astro/**', '.vscode/**', 'node_modules/**'],
-  },
-  {
-    files: ['**/*.{js,mjs,cjs}'],
-    languageOptions: {
-      ecmaVersion: 'latest',
-      sourceType: 'module',
-      globals: {
-        module: 'readonly',
-        require: 'readonly',
-      },
-    },
-    rules: {
-      'no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
-      'no-undef': 'error',
-      'no-redeclare': 'error',
-    },
-  },
-];