Added LinkBlock functionality in admin

• Added:
- LinkBlock functionality in admin

app/views/admin/link_blocks/_link_block.html.haml

@@ -0,0 +1,5 @@
+%tr
+  %td
+    %samp= link_block.link
+  %td
+    = table_link_to 'trash', t('admin.link_blocks.delete'), admin_link_block_path(link_block), method: :delete

app/views/admin/link_blocks/index.html.haml

@@ -0,0 +1,14 @@
+- content_for :page_title do
+  = t('admin.link_blocks.title')
+
+.table-wrapper
+  %table.table
+    %thead
+      %tr
+        %th= t('admin.link_blocks.link')
+        %th
+    %tbody
+      = render @link_blocks
+
+= paginate @link_blocks
+= link_to t('admin.link_blocks.add_new'), new_admin_link_block_path, class: 'button'

app/views/admin/link_blocks/new.html.haml

@@ -0,0 +1,11 @@
+- content_for :page_title do
+  = t('.title')
+
+= simple_form_for @link_block, url: admin_link_blocks_path do |f|
+  = render 'shared/error_messages', object: @link_block
+
+  .fields-group
+    = f.input :link, wrapper: :with_label, label: t('admin.link_blocks.link')
+
+  .actions
+    = f.button :button, t('.create'), type: :submit