fix: add TypeScript declarations for SCSS modules and images, consolidate CI workflows

- Add type declarations for .module.scss files
- Add type declarations for image imports (png, jpg, svg, etc.)
- Update tsconfig.json to include new type declaration files
- Consolidate duplicate lint/typecheck workflows into single Code Quality Check
- Remove redundant pr-lint-check.yml and push-lint-check.yml
- Unified workflow runs both ESLint and TypeScript checks

tsconfig.json

@@ -23,6 +23,6 @@
       "@/*": ["./*"]
     }
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts", "src/types/**/*.d.ts"],
   "exclude": ["node_modules"]
 }