feat: Custom gst webrtc signaller, runtime GPU driver package install and more (#140)

🔥 🔥

Yes lots of commits because rebasing and all.. thankfully I know Git
just enough to have backups 😅

---------

Co-authored-by: Wanjohi <elviswanjohi47@gmail.com>
Co-authored-by: Kristian Ollikainen <DatCaptainHorse@users.noreply.github.com>
Co-authored-by: Wanjohi <71614375+wanjohiryan@users.noreply.github.com>
Co-authored-by: AquaWolf <3daquawolf@gmail.com>

packages/scripts/entrypoint.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+set -euo pipefail
+
+# Wait for dbus socket to be ready
+echo "Waiting for DBus system bus socket..."
+DBUS_SOCKET="/run/dbus/system_bus_socket"
+for _ in {1..10}; do # Wait up to 10 seconds
+    if [ -e "$DBUS_SOCKET" ]; then
+        echo "DBus system bus socket is ready."
+        break
+    fi
+    sleep 1
+done
+if [ ! -e "$DBUS_SOCKET" ]; then
+    echo "Error: DBus system bus socket did not appear. Exiting."
+    exit 1
+fi
+
+# Wait for PipeWire to be ready
+echo "Waiting for PipeWire socket..."
+PIPEWIRE_SOCKET="/run/user/${UID}/pipewire-0"
+for _ in {1..10}; do # Wait up to 10 seconds
+    if [ -e "$PIPEWIRE_SOCKET" ]; then
+        echo "PipeWire socket is ready."
+        break
+    fi
+    sleep 1
+done
+if [ ! -e "$PIPEWIRE_SOCKET" ]; then
+    echo "Error: PipeWire socket did not appear. Exiting."
+    exit 1
+fi
+
+# Update system packages before proceeding
+echo "Upgrading system packages..."
+pacman -Syu --noconfirm
+
+echo "Detecting GPU vendor and installing necessary GStreamer plugins..."
+source /etc/nestri/gpu_helpers.sh
+
+get_gpu_info
+
+# Identify vendor
+if [[ "${vendor_full_map[0],,}" =~ "intel" ]]; then
+    echo "Intel GPU detected, installing required packages..."
+    chwd -a
+    pacman -Syu --noconfirm gstreamer-vaapi gst-plugin-va gst-plugin-qsv
+    # chwd missed a thing
+    pacman -Syu --noconfirm vpl-gpu-rt
+elif [[ "${vendor_full_map[0],,}" =~ "amd" ]]; then
+    echo "AMD GPU detected, installing required packages..."
+    chwd -a
+    pacman -Syu --noconfirm gstreamer-vaapi gst-plugin-va
+elif [[ "${vendor_full_map[0],,}" =~ "nvidia" ]]; then
+    echo "NVIDIA GPU detected. Assuming drivers are linked"
+else
+    echo "Unknown GPU vendor. No additional packages will be installed"
+fi
+
+# Clean up remainders
+echo "Cleaning up old package cache..."
+paccache -rk1
+
+echo "Switching to nestri user for application startup..."
+exec sudo -E -u nestri /etc/nestri/entrypoint_nestri.sh