Update IDE haml view to support EE extensions

- Also creates ide_helper for ide_data which can be extended in EE

app/helpers/ide_helper.rb

+# frozen_string_literal: true
+
+module IdeHelper
+  def ide_data
+    {
+      "empty-state-svg-path" => image_path('illustrations/multi_file_editor_empty.svg'),
+      "no-changes-state-svg-path" => image_path('illustrations/multi-editor_no_changes_empty.svg'),
+      "committed-state-svg-path" => image_path('illustrations/multi-editor_all_changes_committed_empty.svg'),
+      "pipelines-empty-state-svg-path": image_path('illustrations/pipelines_empty.svg'),
+      "promotion-svg-path": image_path('illustrations/web-ide_promotion.svg'),
+      "ci-help-page-path" => help_page_path('ci/quick_start/README'),
+      "web-ide-help-page-path" => help_page_path('user/project/web_ide/index.html'),
+      "clientside-preview-enabled": Gitlab::CurrentSettings.current_application_settings.web_ide_clientside_preview_enabled.to_s
+    }
+  end
+end

app/views/ide/_show.html.haml

+- @body_class = 'ide-layout'
+- page_title 'IDE'
+
+- content_for :page_specific_javascripts do
+  = stylesheet_link_tag 'page_bundles/ide'
+
+#ide.ide-loading{ data: ide_data() }
+  .text-center
+    = icon('spinner spin 2x')
+    %h2.clgray= _('Loading the GitLab IDE...')

app/views/ide/index.html.haml

-- @body_class = 'ide-layout'
-- page_title 'IDE'
-
-- content_for :page_specific_javascripts do
-  = stylesheet_link_tag 'page_bundles/ide'
-
-#ide.ide-loading{ data: {"empty-state-svg-path" => image_path('illustrations/multi_file_editor_empty.svg'),
-  "no-changes-state-svg-path" => image_path('illustrations/multi-editor_no_changes_empty.svg'),
-  "committed-state-svg-path" => image_path('illustrations/multi-editor_all_changes_committed_empty.svg'),
-  "pipelines-empty-state-svg-path": image_path('illustrations/pipelines_empty.svg'),
-  "promotion-svg-path": image_path('illustrations/web-ide_promotion.svg'),
-  "ci-help-page-path" => help_page_path('ci/quick_start/README'),
-  "web-ide-help-page-path" => help_page_path('user/project/web_ide/index.html'),
-  "clientside-preview-enabled": Gitlab::CurrentSettings.current_application_settings.web_ide_clientside_preview_enabled.to_s } }
-  .text-center
-    = icon('spinner spin 2x')
-    %h2.clgray= _('Loading the GitLab IDE...')
+= render 'ide/show'