Fix error, submission, hints and help views

app/views/code_ocean/errors/index.html.slim

@@ -0,0 +1,19 @@
+h1 = CodeOcean::Error.model_name.human(count: 2)
+
+.table-responsive
+  table.table
+    thead
+      tr
+        th = t('errors.index.count')
+        th = t('activerecord.attributes.error.message')
+        th = t('shared.created_at')
+        th = t('shared.actions')
+    tbody
+      - @errors.each do |error|
+        tr
+          td = error.count
+          td = error.message
+          td = l(error.created_at, format: :short)
+          td = link_to(t('shared.show'), execution_environment_error_path(params[:execution_environment_id], error))
+
+p = render('shared/pagination', collection: @errors)

app/views/code_ocean/errors/show.html.slim

@@ -0,0 +1,4 @@
+h1 = CodeOcean::Error.model_name.human
+
+= row(label: 'error.message', value: @error.message)
+= row(label: 'shared.created_at', value: l(@error.created_at, format: :short))