New Settings Menu, Routes and Controllers Organization (#641)

* Add new settings routes and controllers

* Add new settings view, restructure controllers and routes

* Fix lint errors

test/controllers/settings/hostings_controller_test.rb

@@ -0,0 +1,31 @@
+require "test_helper"
+
+class Settings::HostingsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    ENV["SELF_HOSTING_ENABLED"] = "true"
+    sign_in users(:family_admin)
+  end
+
+  test "cannot edit when self hosting is disabled" do
+    ENV["SELF_HOSTING_ENABLED"] = "false"
+
+    get settings_hosting_url
+    assert :not_found
+
+    patch settings_hosting_url, params: { setting: { render_deploy_hook: "https://example.com" } }
+    assert :not_found
+  end
+  test "should get edit when self hosting is enabled" do
+    get settings_hosting_url
+    assert_response :success
+  end
+
+  test "can update settings when self hosting is enabled" do
+    NEW_RENDER_DEPLOY_HOOK = "https://api.render.com/deploy/srv-abc123"
+    assert_nil Setting.render_deploy_hook
+
+    patch settings_hosting_url, params: { setting: { render_deploy_hook: NEW_RENDER_DEPLOY_HOOK } }
+
+    assert_equal NEW_RENDER_DEPLOY_HOOK, Setting.render_deploy_hook
+  end
+end