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.

data/profile.yaml

@@ -0,0 +1,11 @@
+name: William Miceli
+tagline: Contact and links
+initials: WM
+avatar: ""
+links:
+  - label: Email
+    url: "mailto:contact@williammiceli.me"
+    icon: envelope
+  - label: Gitea
+    url: "https://gitea.williammiceli.systems/William"
+    icon: git