Add LndHub db/models, and quick stats for admin views

app/components/quickstats_item_component.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class QuickstatsItemComponent < ViewComponent::Base
+  def initialize(type:, title:, value:, unit: nil, meta: nil, icon_name: nil, icon_color_class: nil)
+    @type = type
+    @title = title
+    @value = value
+    @unit = unit
+    @meta = meta
+    @icon_name = icon_name
+    @icon_color_class = icon_color_class
+  end
+end