Update development translations and page title for consistency

- Changed the menu label from 'Dev Dashboard' to 'Development' in multiple languages for clarity.
- Updated the title in the development page to use 'Development Overview' for better alignment with content.
- Adjusted the heading in development.astro to reflect the new title for improved user experience.

src/pages/[lang]/development.astro

@@ -112,7 +112,7 @@ const formatDate = (dateString) => {
 
 <Layout metadata={metadata}>
   <div class="max-w-4xl mx-auto px-4 py-8">
-    <h1 class="text-xl sm:text-2xl md:text-4xl font-bold mb-4">{t.development.title || 'Development Progress'}</h1>
+    <h1 class="text-xl sm:text-2xl md:text-4xl font-bold mb-4">{t.development.pageTitle || 'Development Progress'}</h1>
     {/* Collapsible Intro */}
     <CollapsibleIntro text={t.development.intro} client:only="react" />
     {/* Contribution Calendar */}