[Feature-Request] {Watchdog}

[Serafadam]

Start with the why:

Currently there is no mechanism of detection if camera got disconnected/stopped streaming due to some crash/bug.

Move to the what:

We need to add a mechanism that checks the device status for the users so that they can investigate/try to restart the device.

Move to the how:

• bond implementation with a minimal node that checks state of the main camera driver
• A timer that polls log information and publishes it as diagnostics message

[Serafadam]

Closed with https://github.com/luxonis/depthai-ros/pull/377