fix: settings page lag (#736)

* feat: made a handler for github stats messages same way as the rest

* fix: remove settingsPageLag through incremental rendering and efficient update of local storage

* refactor: passed eslint

* chore: added GitHubStats types

* feat: added contributor card skeletons

* refactor: pass eslint

* feat: removed trickle rendering and added locking to setCachedData

---------

Co-authored-by: Derek <derex1987@gmail.com>
Co-authored-by: Diego Perez <52579214+doprz@users.noreply.github.com>

src/pages/background/handler/gitHubStatsHandler.ts

@@ -0,0 +1,31 @@
+import type GitHubStatsMessages from '@shared/messages/GitHubStatsMessages';
+import { GitHubStatsService } from '@views/lib/getGitHubStats';
+import type { MessageHandler } from 'chrome-extension-toolkit';
+
+const gitHubStatsService = new GitHubStatsService();
+
+/**
+ * Handler for GitHub stats related messages
+ */
+const gitHubStatsHandler: MessageHandler<GitHubStatsMessages> = {
+    async fetchGitHubStats({ data, sendResponse }) {
+        try {
+            const includeMergedPRs = data ?? false;
+            const stats = await gitHubStatsService.fetchGitHubStats({ includeMergedPRs });
+            sendResponse(stats);
+        } catch (error) {
+            console.error('Error fetching GitHub stats in background:', error);
+            sendResponse({
+                adminGitHubStats: {},
+                userGitHubStats: {},
+                contributors: [],
+                names: {},
+                dataFetched: new Date(),
+                lastUpdated: new Date(),
+                isCached: false,
+            });
+        }
+    },
+};
+
+export default gitHubStatsHandler;