Revamped debug UI and add camera / process info, ffprobe copying (#4349)

* Move each camera to a separate card and show per process info

* Install top

* Add support for cpu usage stats

* Use cpu usage stats in debug

* Increase number of runs to ensure good results

* Add ffprobe endpoint

* Get ffprobe for multiple inputs

* Copy ffprobe in output

* Add fps to camera metrics

* Fix lint errors

* Update stats config

* Add ffmpeg pid

* Use grid display so more cameras can take less vertical space

* Fix hanging characters

* Only show the current detector

* Fix bad if statement

* Return full output of ffprobe process

* Return full output of ffprobe process

* Don't specify rtsp_transport

* Make ffprobe button show dialog with output and option to copy

* Adjust ffprobe api to take paths directly

* Add docs for ffprobe api

docs/docs/integrations/api.md

@@ -264,3 +264,11 @@ Get recording segment details for the given timestamp range.
 | -------- | ---- | ------------------------------------- |
 | `after`  | int  | Unix timestamp for beginning of range |
 | `before` | int  | Unix timestamp for end of range       |
+
+### `GET /api/ffprobe`
+
+Get ffprobe output for camera feed paths.
+
+| param   | Type   | Description                        |
+| ------- | ------ | ---------------------------------- |
+| `paths` | string | `,` separated list of camera paths |