Update configuration and content for improved SEO and user experience

- Enhanced sitemap configuration to limit entries and ensure a single sitemap generation.
- Updated robots.txt to reflect the new sitemap URL.
- Revised metadata descriptions and titles across multiple pages for better SEO alignment.
- Obfuscated email address in the footer for improved privacy.
- Adjusted content in various pages to better reflect services offered and enhance clarity.

src/pages/[lang]/index.astro

@@ -24,7 +24,8 @@ if (!supportedLanguages.includes(lang)) {
 const t = getTranslation(lang);
 
 const metadata = {
-  title: t.metadata.title,
+  title: '365DevNet | IT Systems & Automation for Businesses | Richard Bergsma',
+  description: 'IT systems & automation for businesses. Microsoft 365, Power Automate, and cloud solutions by Richard Bergsma.'
 };
 ---