Add Hugo link page with Sveltia CMS admin

Content lives in data/profile.yaml and is edited as structured fields through Sveltia at /admin/, so the page is never hand-written HTML. The CMS bundle is vendored at a pinned version instead of loaded from unpkg, and the admin assets ship with the built site, so hosting and builds stay self-contained. PKCE sign-in activates once a Gitea OAuth application client ID is added to static/admin/config.yml.

content/_index.md

@@ -0,0 +1,4 @@
+---
+title: "William Miceli"
+description: "Contact links for William Miceli."
+---