Add admin settings page for BTCPay

app/views/admin/settings/services/_btcpay.html.erb

@@ -0,0 +1,25 @@
+<h3>BTCPay Server</h3>
+<ul role="list">
+  <%= render FormElements::FieldsetToggleComponent.new(
+    form: f,
+    attribute: :btcpay_enabled,
+    enabled: Setting.btcpay_enabled?,
+    title: "Enable BTCPay integration",
+    description: "BTCPay configuration present and features enabled"
+  ) %>
+<% if Setting.btcpay_enabled? %>
+  <%= render FormElements::FieldsetResettableSettingComponent.new(
+        key: :btcpay_api_url,
+        title: "API URL"
+      ) %>
+  <%= render FormElements::FieldsetResettableSettingComponent.new(
+        key: :btcpay_store_id,
+        title: "Store ID"
+      ) %>
+  <%= render FormElements::FieldsetResettableSettingComponent.new(
+        key: :btcpay_auth_token,
+        type: :password,
+        title: "Auth Token"
+      ) %>
+<% end %>
+</ul>