feat: Fully use protobuf, fix controller issues and cleanup (#305)

## Description
### First commit
Restructured protobuf schemas to make them easier to use across
languages, switched to using them in-place of JSON for signaling as
well, so there's no 2 different message formats flying about. Few new
message types to deal with clients and nestri-servers better (not final
format, may see changes still).

General cleanup of dead/unused code along some bug squashing and package
updates.

TODO for future commits:
- [x] Fix additional controllers not doing inputs (possibly needs
vimputti changes)
- [x] ~~Restructure relay protocols code a bit, to reduce bloatiness of
the currently single file for them, more code re-use.~~
- Gonna keep this PR somewhat manageable without poking more at relay..
- [x] ~~Try to fix issue where with multiple clients, static stream
content causes video to freeze until there's some movement.~~
- Was caused by server tuned profile being `throughput-performance`,
causing CPU latency to be too high.
- [x] Ponder the orb


### Second + third commit
Redid the controller polling handling and fixed multi-controller
handling in vimputti and nestri code sides. Remove some dead relay code
as well to clean up the protocol source file, we'll revisit the meshing
functionality later.

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

* **New Features**
* Added software rendering option and MangoHud runtime config;
controller sessions now support reconnection and batched state updates
with persistent session IDs.

* **Bug Fixes**
* Restored previously-filtered NES-like gamepads so they connect
correctly.

* **Chores**
* Modernized dependencies and protobuf tooling, migrated to
protobuf-based messaging and streaming, and removed obsolete CUDA build
steps.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

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

containerfiles/runner-builder.Containerfile

@@ -41,7 +41,7 @@ RUN --mount=type=cache,target=/var/cache/pacman/pkg \
     pacman -Sy --noconfirm lib32-gcc-libs
 
 # Clone repository
-RUN git clone --depth 1 --rev "9e8bfd0217eeab011c5afc368d3ea67a4c239e81" https://github.com/DatCaptainHorse/vimputti.git
+RUN git clone --depth 1 --rev "2fde5376b6b9a38cdbd94ccc6a80c9d29a81a417" https://github.com/DatCaptainHorse/vimputti.git
 
 #--------------------------------------------------------------------
 FROM vimputti-manager-deps AS vimputti-manager-planner
@@ -129,23 +129,8 @@ RUN --mount=type=cache,target=/var/cache/pacman/pkg \
 RUN --mount=type=cache,target=${CARGO_HOME}/registry \
     cargo install cargo-c
 
-# Grab cudart from NVIDIA..
-RUN wget https://developer.download.nvidia.com/compute/cuda/redist/cuda_cudart/linux-x86_64/cuda_cudart-linux-x86_64-13.0.96-archive.tar.xz -O cuda_cudart.tar.xz && \
-    mkdir cuda_cudart && tar -xf cuda_cudart.tar.xz -C cuda_cudart --strip-components=1 && \
-    cp cuda_cudart/lib/libcudart.so cuda_cudart/lib/libcudart.so.* /usr/lib/ && \
-    rm -r cuda_cudart && \
-    rm cuda_cudart.tar.xz
-
-# Grab cuda lib from NVIDIA (it's in driver package of all things..)
-RUN wget https://developer.download.nvidia.com/compute/cuda/redist/nvidia_driver/linux-x86_64/nvidia_driver-linux-x86_64-580.95.05-archive.tar.xz -O nvidia_driver.tar.xz && \
-    mkdir nvidia_driver && tar -xf nvidia_driver.tar.xz -C nvidia_driver --strip-components=1 && \
-    cp nvidia_driver/lib/libcuda.so.* /usr/lib/libcuda.so && \
-    ln -s /usr/lib/libcuda.so /usr/lib/libcuda.so.1 && \
-    rm -r nvidia_driver && \
-    rm nvidia_driver.tar.xz
-
 # Clone repository
-RUN git clone --depth 1 --rev "afa853fa03e8403c83bbb3bc0cf39147ad46c266" https://github.com/games-on-whales/gst-wayland-display.git
+RUN git clone --depth 1 --rev "a4abcfe2cffe2d33b564d1308b58504a5e3012b1" https://github.com/games-on-whales/gst-wayland-display.git
 
 #--------------------------------------------------------------------
 FROM gst-wayland-deps AS gst-wayland-planner
@@ -214,5 +199,4 @@ COPY --from=gst-wayland-cached-builder /artifacts/include/ /artifacts/include/
 COPY --from=vimputti-manager-cached-builder /artifacts/vimputti-manager /artifacts/bin/
 COPY --from=vimputti-manager-cached-builder /artifacts/libvimputti_shim_64.so /artifacts/lib64/libvimputti_shim.so
 COPY --from=vimputti-manager-cached-builder /artifacts/libvimputti_shim_32.so /artifacts/lib32/libvimputti_shim.so
-COPY --from=gst-wayland-deps /usr/lib/libcuda.so /usr/lib/libcuda.so.* /artifacts/lib/
 COPY --from=bubblewrap-builder /artifacts/bin/bwrap /artifacts/bin/

containerfiles/runner.Containerfile

@@ -72,6 +72,11 @@ RUN mkdir -p "${NESTRI_HOME}/.local/share/Steam/config"
 
 COPY packages/configs/steam/config.vdf "${NESTRI_HOME}/.local/share/Steam/config/"
 
+## MangoHud Config ##
+RUN mkdir -p "${NESTRI_HOME}/.config/MangoHud"
+
+COPY packages/configs/MangoHud/MangoHud.conf "${NESTRI_HOME}/.config/MangoHud/"
+
 ### Artifacts from Builder ###
 COPY --from=builder /artifacts/bin/nestri-server /usr/bin/
 COPY --from=builder /artifacts/bin/bwrap /usr/bin/