Rewrite restream (#5106)

* Tear out restream config

* Rework birdseye restream

* Create go2rtc config handler

* Fix bug

* Write start script

* Rework style

* Fix python run syntax

* Output as json instead of yaml

* Put old live config back and fix birdseye references

* Fix camera webUI

* Add frigate env var subsitutions

* Fix webui checks

* Check keys

* Remove unused prest

* Fix tests

* Update restream docs

* Update restream docs

* Update live docs

* Update camera specific recommendation

* Update more docs

* add links for the docs

Co-authored-by: Felipe Santos <felipecassiors@gmail.com>

* Update note about supported audio codecs

* Move restream to go2rtc

* Docs fixes

* Add verification of stream name

* Ensure that webUI uses camera name

* Update docs to reflect new live stream name

* Fix check

* Formatting

* Remove audio from detect

Co-authored-by: Felipe Santos <felipecassiors@gmail.com>

* Fix docs

* Don't handle env variable substitution

* Add go2rtc version

* Clarify docs

Co-authored-by: Felipe Santos <felipecassiors@gmail.com>

docs/docs/configuration/camera_specific.md

@@ -14,6 +14,12 @@ This page makes use of presets of FFmpeg args. For more information on presets,
 Note that mjpeg cameras require encoding the video into h264 for recording, and restream roles. This will use significantly more CPU than if the cameras supported h264 feeds directly. It is recommended to use the restream role to create an h264 restream and then use that as the source for ffmpeg.
 
 ```yaml
+go2rtc:
+  streams:
+    mjpeg_cam: ffmpeg:{your_mjpeg_stream_url}#video=h264#hardware # <- use hardware acceleration to create an h264 stream usable for other components.
+
+cameras:
+  ...
   mjpeg_cam:
     ffmpeg:
       inputs:
@@ -21,12 +27,6 @@ Note that mjpeg cameras require encoding the video into h264 for recording, and
           roles:
             - detect
             - record
-        - path: {your_mjpeg_stream_url}
-          roles:
-            - restream
-    restream:
-      enabled: true
-      video_encoding: h264
 ```
 
 ## JPEG Stream Cameras