widgets: bump qml-common, rename Dank* prefixed widgets to D, add

deprecation notice to plugin compatibility shims

- When qml-common became a thing, we left qs.Widgets shims in place for
  plugin compatibility
- It's annoying to need to maintain them when qml-common has any change,
  add a warning so we can safely deprecate them in the future
- One shot rename the common stuff to D to make it shorter and nicer to
  write

quickshell/PLUGINS/ControlCenterExample/ControlCenterExampleWidget.qml

@@ -1,7 +1,7 @@
 import QtQuick
 import qs.Common
 import qs.Services
-import qs.Widgets
+import qs.DCommon.Widgets
 import qs.Modules.Plugins
 
 PluginComponent {
@@ -29,7 +29,7 @@ PluginComponent {
         Row {
             spacing: Theme.spacingXS
 
-            DankIcon {
+            DIcon {
                 name: root.isEnabled ? "toggle_on" : "toggle_off"
                 color: root.isEnabled ? Theme.primary : Theme.surfaceVariantText
                 size: root.iconSize
@@ -49,7 +49,7 @@ PluginComponent {
         Column {
             spacing: Theme.spacingXS
 
-            DankIcon {
+            DIcon {
                 name: root.isEnabled ? "toggle_on" : "toggle_off"
                 color: root.isEnabled ? Theme.primary : Theme.surfaceVariantText
                 size: root.iconSize