feat: Migrate ESLint to flat config and resolve initial linting errors

Migrated the ESLint configuration to the new flat config format ()
and addressed several initial linting errors.

Key changes include:
- Updated ESLint configuration to treat  as warnings instead of errors.
- Fixed  errors in  by declaring  and .
- Corrected  error in  by using  instead of an out-of-scope .
- Resolved  error in  by replacing the undefined  directive with the  component.
- Addressed  errors in  by replacing  with  and  with .
- Fixed  errors in  by importing necessary modules (, , ) and adding missing props (, , , , ).

svelte.config.js

@@ -11,10 +11,10 @@ const config = {
 	preprocess: [vitePreprocess()],
 
 	vitePlugin: {
-		inspector: true,
+		inspector: true
 	},
 	kit: {
-		adapter: adapter_node(),
+		adapter: adapter_node()
 
 		// adapter: adapter_static({
 		// 	// default options are shown. On some platforms
@@ -39,4 +39,4 @@ const config = {
 		// },
 	}
 };
-export default config;
+export default config;