Add example Docker Compose configurations for Neko (#684)

* Add example Docker Compose configurations for Neko

- Introduced a simple browser example using Firefox in Docker with optional persistent profile configuration.
- Added a TURN server example using Coturn alongside Neko for WebRTC support.
- Updated installation documentation to include new examples and improved organization.
- Enhanced Docusaurus configuration to support dynamic code imports for example files.
- Updated package dependencies to include remark-code-import for better documentation handling.

* feat: rename GPU-accelerated browser examples for Intel and Nvidia.

* feat: update GPU browser examples and add OAuth configuration example

* feat: add Raspberry Pi GPU browser example and update documentation links

* feat: update GPU browser examples section for clarity and organization

examples/gpu-raspberry-pi-browser/docker-compose.yaml

@@ -0,0 +1,43 @@
+# Neko - Raspberry Pi Browser Example
+#
+# Runs Firefox on a Raspberry Pi (or similar ARM SBC). Works out of the box
+# with software rendering/encoding; see below for optional hardware-
+# accelerated encoding on boards with a V4L2 M2M encoder (e.g. Pi 3/4).
+#
+# See supported architectures and known caveats:
+# https://neko.m1k1o.net/docs/v3/installation/docker-images#availability
+services:
+  neko:
+    image: "ghcr.io/m1k1o/neko/firefox:latest"
+    restart: "unless-stopped"
+    # increase on Pi's with more than 1gb ram.
+    shm_size: "520mb"
+    ports:
+      - "8080:8080"
+      - "52000-52100:52000-52100/udp"
+    # note: required for the GPU ACCELERATION OPTION below, alternatively
+    #       mount the specific /dev/video* devices instead of running privileged.
+    # privileged: true
+    environment:
+      # GPU ACCELERATION OPTION: enable hardware encoding via the Broadcom
+      # VideoCore V4L2 M2M encoder (available on Raspberry Pi 3/4, not Pi 5).
+      # Requires `privileged: true` above (or the matching /dev/video* devices).
+      # NEKO_CAPTURE_VIDEO_PIPELINE: |
+      #   ximagesrc display-name={display} show-pointer=true use-damage=false
+      #     ! video/x-raw,framerate=25/1
+      #     ! videoconvert ! queue
+      #     ! video/x-raw,format=NV12
+      #     ! v4l2h264enc
+      #       name=encoder
+      #       extra-controls="controls,h264_profile=1,video_bitrate=1250000;"
+      #     ! h264parse config-interval=-1
+      #     ! video/x-h264,stream-format=byte-stream
+      #     ! appsink name=appsink
+      # NEKO_CAPTURE_VIDEO_CODEC: "h264"
+      NEKO_DESKTOP_SCREEN: '1280x720@30'
+      NEKO_MEMBER_MULTIUSER_USER_PASSWORD: neko
+      NEKO_MEMBER_MULTIUSER_ADMIN_PASSWORD: admin
+      NEKO_WEBRTC_EPR: 52000-52100
+      NEKO_WEBRTC_ICELITE: 1
+      # See: https://neko.m1k1o.net/docs/v3/configuration/webrtc#nat1to1
+      # NEKO_WEBRTC_NAT1TO1: <your-IP>