Added types for store

src/lib/store.ts

@@ -1,6 +1,7 @@
-import { writable } from 'svelte/store';
+import { writable, type Writable } from 'svelte/store';
 
-export const gitTokens = writable({
+export const gitTokens: Writable<{ githubToken: string | null; gitlabToken: string | null }> =
+	writable({
 		githubToken: null,
 		gitlabToken: null
-});
+	});