✨ Add ESLint configuration and fix all linting warnings

- Add eslint.config.mjs with TypeScript support
- Install @eslint/js, eslint, typescript-eslint
- Fix unused imports (real, VideoInfo, CollectResult, sortMap)
- Fix unused variables (MAX_VIDEO_AGE_DAYS, catch error vars)
- Replace 'any' types with proper type assertions
- All 11 warnings resolved, lint now passes cleanly
- All 17 tests still passing

Author: ComBbaJunior

eslint.config.mjs

@@ -0,0 +1,19 @@
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    ignores: ['dist/', 'node_modules/', 'coverage/', 'data/'],
+  },
+  {
+    files: ['**/*.ts'],
+    rules: {
+      '@typescript-eslint/no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
+      '@typescript-eslint/explicit-function-return-type': 'off',
+      '@typescript-eslint/no-explicit-any': 'warn',
+      'no-console': 'off',
+    },
+  }
+);