docs: show archived/pre-release banner based on version

Also clean up some stuff we're not going to use.

Signed-off-by: Andrey Smirnov <[email protected]>

website/.gitignore

@@ -1,10 +1 @@
-*.log
-.cache
-.DS_Store
-src/.temp
-node_modules
-dist
-public
-!.env.example
-.env
-.env.*
+resources

website/content/v1.0/_index.md

@@ -4,6 +4,7 @@ no_list: true
 linkTitle: "Documentation"
 cascade:
   type: docs
+preRelease: true
 ---
 
 ## Welcome

website/themes/docsy/layouts/partials/version-banner.html

@@ -1,15 +1,26 @@
 <!-- Check the variable that indicates whether this is an archived doc set.
   If yes, display a banner. -->
-  {{ if .Site.Params.archived_version }}
+{{ $latest_version := .Site.Params.url_latest_version }}
+{{ $current_version := .Section | printf "/%s" }}
+
+{{ if .FirstSection.Params.prerelease }}
   {{ $color := "primary" }}
-  {{ $latest_version := .Site.Params.url_latest_version }}
-  {{ $current_version := .Site.Params.version }}
   <div class="pageinfo pageinfo-{{ $color }}">
-    {{ with $current_version }}<p>Version {{ . | markdownify }} of the
+    {{ with $current_version }}<p>Version {{ trim . "/" | markdownify }} of the
+      documentation is for the Talos version being developed.
+      {{ with $latest_version }}For the latest stable version of Talos, see the
+        <a href="{{ $latest_version | safeURL }}">latest version</a>.</p>
+      {{ end }}
+    {{ end }}
+  </div>
+{{ else if ne $latest_version $current_version }}
+  {{ $color := "primary" }}
+  <div class="pageinfo pageinfo-{{ $color }}">
+    {{ with $current_version }}<p>Version {{ trim . "/" | markdownify }} of the
       documentation is no longer actively maintained. The site that you are
-      currently viewing is an archived snapshot. 
-      {{ with $latest_version }}For up-to-date documentation, see the 
-        <a href="{{ $latest_version | safeURL }}" target="_blank">latest version</a>.</p>
+      currently viewing is an archived snapshot.
+      {{ with $latest_version }}For up-to-date documentation, see the
+        <a href="{{ $latest_version | safeURL }}">latest version</a>.</p>
       {{ end }}
     {{ end }}
   </div>