Ship KDE Connect inside Frame Control instead of downloading it on the Frame

The keyboard and trackpad no longer fetch KDE Connect from Valve's package
repository on the Frame. The desktop apps and the iPhone app's Frame bundle
carry Valve's arm64 build of kdeconnect 24.02.2-1 and the five libraries it
links (kcontacts, kpeople, modemmanager-qt, pulseaudio-qt, libfakekey),
pinned by SHA-256 in frame/kdeconnect/packages.json and downloaded at build
time from the kdeconnect-frame-24.02.2-1 release, which also holds Valve's
complete source package for each.

On first use the computer copies them over its SSH connection (the iPhone
bundle already has them on the Frame); the agent checks each SHA-256,
unpacks them and stamps which build it is, so later starts copy nothing.
No internet on the Frame, 3.6 MB instead of 8 MB, 18 MB unpacked instead of
82 MB (ModemManager and friends were packaging-only dependencies).

GPL/LGPL compliance: frame/kdeconnect/NOTICE.md names each exact version,
licence and source; per-project licence texts in frame/kdeconnect/LICENSES;
THIRD_PARTY_NOTICES.md; an About and licences dialog in the app.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

frame/kdeconnect/LICENSES/modemmanager-qt/LicenseRef-KDE-Accepted-LGPL.txt

@@ -0,0 +1,12 @@
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 3 of the license or (at your option) any later version
+that is accepted by the membership of KDE e.V. (or its successor
+approved by the membership of KDE e.V.), which shall act as a
+proxy as defined in Section 6 of version 3 of the license.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.