🐜 fix(runner): Improve NVIDIA driver handling, switch to gamescope (#279)

## Description
- Made it so failed NVIDIA driver install won't quit entrypoint script
if other GPU vendors are present (fixes mixed GPU cases).
- Switch to gamescope as compositor, with optional SYS_NICE cap handling
for higher priority.
- Use mangohud preset 2 for stats, which is more compact.
- Fixes to nestri-server lspci regex, to deal with AMD naming scheme.
- Added missing radeon vulkan driver packages.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
	- Added support for additional AMD Vulkan drivers.
- Integrated Steam launch directly within the gamescope compositor for a
streamlined startup.

- **Bug Fixes**
- Improved GPU driver fallback handling to ensure smoother operation on
systems without NVIDIA GPUs.
	- Enhanced PCI device parsing for more accurate GPU detection.

- **Chores**
- Updated environment configuration to use X11 session type and set
MangoHud preset.
- Removed unused packages and legacy compositor/resolution management
logic.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: DatCaptainHorse <DatCaptainHorse@users.noreply.github.com>

containers/runner.Containerfile

@@ -132,9 +132,11 @@ RUN sed -i \
 # Core system components
 RUN --mount=type=cache,target=/var/cache/pacman/pkg \
     pacman -Sy --needed --noconfirm \
-        vulkan-intel lib32-vulkan-intel vpl-gpu-rt mesa \
+        vulkan-intel lib32-vulkan-intel vpl-gpu-rt \
+        vulkan-radeon lib32-vulkan-radeon \
+        mesa \
         steam steam-native-runtime gtk3 lib32-gtk3 \
-        sudo xorg-xwayland seatd libinput labwc wlr-randr gamescope mangohud \
+        sudo xorg-xwayland seatd libinput gamescope mangohud \
         libssh2 curl wget \
         pipewire pipewire-pulse pipewire-alsa wireplumber \
         noto-fonts-cjk supervisor jq chwd lshw pacman-contrib && \