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

src/types/images.d.ts

@@ -0,0 +1,29 @@
+declare module "*.png" {
+	const value: string;
+	export default value;
+}
+
+declare module "*.jpg" {
+	const value: string;
+	export default value;
+}
+
+declare module "*.jpeg" {
+	const value: string;
+	export default value;
+}
+
+declare module "*.svg" {
+	const value: string;
+	export default value;
+}
+
+declare module "*.gif" {
+	const value: string;
+	export default value;
+}
+
+declare module "*.webp" {
+	const value: string;
+	export default value;
+}

src/types/scss.d.ts

@@ -0,0 +1,4 @@
+declare module "*.module.scss" {
+	const classes: { [key: string]: string };
+	export default classes;
+}