refactor(docs): separate Pages site source (#6176)

* refactor(docs): separate Pages site source

* fix(docs): preserve published guide pages

* fix(ci): run asset ownership tests for site changes

* fix(docs): track future website media

* fix(ci): let Pages deployments finish

* build(deps): update Pages checkout action

* fix(ci): follow moved setup guide

* fix(docs): repair published setup guide

* fix(docs): retarget preview encoder

website/_config.yml

@@ -0,0 +1,10 @@
+title: Odysseus
+description: A self-hosted AI workspace for chat, agents, tools, and local models.
+theme: jekyll-theme-primer
+
+plugins:
+  - jekyll-relative-links
+
+relative_links:
+  enabled: true
+  collections: true