Rename plugin namespace from jandieman to dotjuice

Updates manifest id/author, the QML moduleName/ipcTarget, and every
doc reference to match.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MLfSWFEMyY85ZDWEYicdaF

Panel.qml

@@ -8,8 +8,8 @@ import qs.Ui
 
 Panel {
   id: root
-  moduleName: "jandieman.hypr-rdp"
-  ipcTarget: "jandieman.hypr-rdp"
+  moduleName: "dotjuice.hypr-rdp"
+  ipcTarget: "dotjuice.hypr-rdp"
 
   readonly property color fg: root.bar ? root.bar.foreground : Color.foreground
   readonly property color dim: Qt.darker(fg, 1.45)