Add QR code icon, button, modal for invites

Using https://excid3.github.io/tailwindcss-stimulus-components/

app/components/qr_code_modal_component.rb

@@ -0,0 +1,24 @@
+require "rqrcode"
+
+class QrCodeModalComponent < ViewComponent::Base
+  def initialize(qr_content:, description: nil)
+    @description = description
+    @qr_code_svg = qr_code_svg(qr_content)
+  end
+
+  private
+
+  def qr_code_svg(content)
+    qr_code = RQRCode::QRCode.new(content)
+    qr_code.as_svg(
+      color: "000",
+      shape_rendering: "crispEdges",
+      module_size: 6,
+      standalone: true,
+      use_path: true,
+      svg_attributes: {
+        class: 'inline-block'
+      }
+    )
+  end
+end