feat(i18n): add slogans and update translations for multiple pages

Add new slogan translations for projects and blog pages in both English and Chinese
Update about and services pages with additional content
Modify footer to include remote work availability notice

src/pages/projects.astro

@@ -33,7 +33,7 @@ const currentProjects = projects[lang as keyof typeof projects] || projects.en;
 
           <!-- Description -->
           <p class="text-lg text-muted-foreground max-w-3xl mx-auto mb-12 leading-relaxed">
-            {t('projects.description')}
+            {t('projects.slogan')} {t('projects.description')}
           </p>
         </div>
       </Container>