ISTWCMS-3828 Create UW site management menu

config/install/system.menu.uw-menu-site-management.yml

+langcode: en
+status: true
+dependencies: {  }
+id: uw-menu-site-management
+label: 'Site management'
+description: 'Menu with options for Site Managers.'
+locked: false

uw_dashboard.features.yml

+required: true

uw_dashboard.info.yml

+name: 'UW Dashboard'
+description: 'Block placement for dashboard blocks and site management menu'
+type: module
+core: 8.x
+dependencies:
+  - system