Adjust routes

Simple routes have been moved into a single `Misc` file.

Embed routes have been moved into a single `Embed` file.

The preferences route has been renamed to be more consistent with other parts
of the codebase.

src/invidious/routes/misc.cr

@@ -0,0 +1,38 @@
+class Invidious::Routes::Misc < Invidious::Routes::BaseRoute
+  def home(env)
+    preferences = env.get("preferences").as(Preferences)
+    locale = LOCALES[preferences.locale]?
+    user = env.get? "user"
+
+    case preferences.default_home
+    when "Popular"
+      env.redirect "/feed/popular"
+    when "Trending"
+      env.redirect "/feed/trending"
+    when "Subscriptions"
+      if user
+        env.redirect "/feed/subscriptions"
+      else
+        env.redirect "/feed/popular"
+      end
+    when "Playlists"
+      if user
+        env.redirect "/view_all_playlists"
+      else
+        env.redirect "/feed/popular"
+      end
+    else
+      templated "empty"
+    end
+  end
+
+  def privacy(env)
+    locale = LOCALES[env.get("preferences").as(Preferences).locale]?
+    templated "privacy"
+  end
+
+  def licenses(env)
+    locale = LOCALES[env.get("preferences").as(Preferences).locale]?
+    rendered "licenses"
+  end
+end