⚡ Add thumbnail renderer

And integrate the dashboard thumbnails to use that service

frontend/shadow-cljs.edn

@@ -16,17 +16,25 @@
    :modules
    {:shared {:entries []}
 
-    :main {:entries [app.main]
-           :depends-on #{:shared}
-           :init-fn app.main/init}
+    :main
+    {:entries [app.main]
+     :depends-on #{:shared}
+     :init-fn app.main/init}
 
-    :render {:entries [app.render]
-             :depends-on #{:shared}
-             :init-fn app.render/init}
+    :render
+    {:entries [app.render]
+     :depends-on #{:shared}
+     :init-fn app.render/init}
 
-    :worker {:entries [app.worker]
-             :web-worker true
-             :depends-on #{:shared}}}
+    :worker
+    {:entries [app.worker]
+     :web-worker true
+     :depends-on #{:shared}}
+
+    :thumbnail-renderer
+    {:entries [app.thumbnail-renderer]
+     :depends-on #{:shared}
+     :init-fn app.thumbnail-renderer/init}}
 
    :compiler-options
    {:output-feature-set :es2020