Frametop: a multi-screen desktop and universal 3D mouse for the Steam Frame

Several KDE Plasma screens floating in SteamVR, each a real monitor of any
resolution and shape, shown by our own compositor (ft-screens), with a
layout, wrist pinning, and visibility modes; a Bluetooth mouse that drives
all of SteamVR as a room-anchored 3D pointer (input relay, ft-pointer
helper, ft_pointer SteamVR driver); two settings apps; and Bluetooth LE
fixes. Installs on the headset with ./install.sh.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/sync.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# One-way sync of this repo from a PC to ~/dev/frametop on the Steam Frame.
+# Usage: scripts/sync.sh [extra rsync args, e.g. --dry-run]
+# Honors .gitignore files and skips .git (dirs, and the files submodules use), build outputs, and .env files.
+# --delete only removes files inside ~/dev/frametop on the headset.
+# On the Frame itself there's nothing to do: the checkout is used directly.
+set -euo pipefail
+
+root=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+. "$root/scripts/_env.sh"
+if [ "$FRAME_LOCAL" = 1 ]; then
+  exit 0
+fi
+
+exec rsync -az --delete --info=stats1 \
+  --filter=':- .gitignore' \
+  --exclude='.git' --exclude='target/' --exclude='build/' --exclude='.env' --exclude='.env.*' \
+  "$@" "$root/" "$FRAME_HOST:${FRAME_REPO#/home/steamos/}/"