Added SEO to website pages (#5106)

Added SEO to Contributors, Contributor, User Guide (+ each of it's
pages), Changelog, OSS friends: titles, descriptions

Co-authored-by: Ady Beraud <a.beraud96@gmail.com>

packages/twenty-website/src/shared-utils/formatSlug.ts

@@ -0,0 +1,6 @@
+export function formatSlug(slug: string): string {
+  return slug
+    .split('-')
+    .map((word: string) => word?.charAt(0)?.toUpperCase?.() + word?.slice?.(1))
+    .join(' ');
+}