Add kde patches

The nixpkgs patch is to clear out a conflict with a patch that's applied
to plasma-workspace by nixpkgs

roles/kde/patches/bluedevil/pr218.patch

@@ -0,0 +1,53 @@
+From ddbf7452c6f2fe8849de723175710dbf39242422 Mon Sep 17 00:00:00 2001
+From: Nate Graham <nate@kde.org>
+Date: Fri, 13 Jun 2025 11:55:47 -0600
+Subject: [PATCH] applet: use standard section headers
+
+We have them; might as well use them. This lets us get rid of a bunch of
+complex and fragile code that's responsible for the existing separator.
+---
+ .../contents/ui/FullRepresentation.qml        | 27 +++----------------
+ 1 file changed, 3 insertions(+), 24 deletions(-)
+
+diff --git a/src/applet/package/contents/ui/FullRepresentation.qml b/src/applet/package/contents/ui/FullRepresentation.qml
+index df989267d..27295de21 100644
+--- a/src/applet/package/contents/ui/FullRepresentation.qml
++++ b/src/applet/package/contents/ui/FullRepresentation.qml
+@@ -111,31 +111,10 @@ PlasmaExtras.Representation {
+             bottomMargin: Kirigami.Units.largeSpacing
+ 
+             section.property: "Section"
+-            // We want to hide the section delegate for the "Connected"
+-            // group because it's unnecessary; all we want to do here is
+-            // separate the connected devices from the available ones
+-            section.delegate: Loader {
++            section.delegate: PlasmaExtras.ListSectionHeader {
+                 required property string section
+-
+-                active: section !== "Connected" && BluezQt.Manager.connectedDevices.length > 0
+-
+-                width: ListView.view.width - ListView.view.leftMargin - ListView.view.rightMargin
+-                // Need to manually set the height or else the loader takes up
+-                // space after the first time it unloads a previously-loaded item
+-                height: active ? Kirigami.Units.gridUnit : 0
+-
+-                // give us 2 frames to try and figure out a layout, this reduces jumpyness quite a bit but doesn't
+-                // entirely eliminate it https://bugs.kde.org/show_bug.cgi?id=438610
+-                Behavior on height { PropertyAnimation { duration: 32 } }
+-
+-                sourceComponent: Item {
+-                    KSvg.SvgItem {
+-                        width: parent.width - Kirigami.Units.gridUnit * 2
+-                        anchors.centerIn: parent
+-                        imagePath: "widgets/line"
+-                        elementId: "horizontal-line"
+-                    }
+-                }
++                width: listView.width - listView.leftMargin - listView.rightMargin
++                text: section
+             }
+             highlight: PlasmaExtras.Highlight {}
+             highlightMoveDuration: Kirigami.Units.shortDuration
+-- 
+GitLab
+