refactor(app): rename GitLite to Gitty throughout the application

The application has been rebranded from GitLite to Gitty, which involved
updating various references across the codebase, including titles,
descriptions, and identifiers. This change reflects the new branding
strategy and ensures consistency in the user interface and backend.

- Updated project name and identifiers in configuration files
- Changed all instances of "GitLite" to "Gitty" in HTML and Svelte files
- Adjusted descriptions and help texts to match the new branding

src/App.svelte

@@ -2896,7 +2896,7 @@
 </script>
 
 <svelte:head>
-  <title>GitLite</title>
+  <title>Gitty</title>
 </svelte:head>
 
 <svelte:window on:click={handleWindowClick} on:keydown={handleWindowKeydown} on:contextmenu|capture={handleWindowContextMenu} />

src/lib/TitleBar.svelte

@@ -48,7 +48,7 @@
     <span class="titlebar-brand-icon" data-tauri-drag-region>
       <img src={iconUrl} alt="" data-tauri-drag-region />
     </span>
-    <span data-tauri-drag-region>GitLite</span>
+    <span data-tauri-drag-region>Gitty</span>
     {#if appVersion}
       <span class="tb-version" data-tauri-drag-region title="Version {appVersion}">v{appVersion}</span>
     {/if}

src/lib/components/AnalyticsNoticeDialog.svelte

@@ -30,7 +30,7 @@
       </div>
       <div class="analytics-notice-copy">
         <p>
-          GitLite can send anonymous usage events to Aptabase so crashes, rough edges, and commonly used workflows are easier to improve.
+          Gitty can send anonymous usage events to Aptabase so crashes, rough edges, and commonly used workflows are easier to improve.
         </p>
         <p>
           Events do not include repository paths, remote URLs, branch names, commit messages, diffs, file names, credentials, or source code.

src/lib/components/AppSettingsDialog.svelte

@@ -29,7 +29,7 @@
   <div class="dialog app-settings-dialog" role="dialog" aria-modal="true" aria-label="Settings" tabindex="-1">
     <header class="dialog-header">
       <div>
-        <span class="eyebrow">GitLite</span>
+        <span class="eyebrow">Gitty</span>
         <h2 class="dialog-title">Settings</h2>
       </div>
       <button class="dialog-close" type="button" onclick={onClose} title="Close">

src/lib/components/UpdateToast.svelte

@@ -44,7 +44,7 @@
   );
   const description = $derived(
     state === "installed"
-      ? "Restart GitLite to use the new version."
+      ? "Restart Gitty to use the new version."
       : state === "downloading"
         ? "Download and installation are running in the background."
         : state === "error"