core: frontend: download extension logs

[ES-Alexander]

Current behaviour

Downloading system logs is typically only for BlueOS-core. When troubleshooting it can be relevant to have logs from other software running.

Expected or desired behaviour

Add an "include extension logs" checkbox to the System Log Files section, so the download button includes logs from the extensions directory (perhaps specifically any folder that's extensions/*/logs/).

Prerequisites

• I have checked to make sure that a similar request has not already been filed or fixed.

[rotu]

I don't expect extensions to be able to log to file, especially if the extension fails to start unexpectedly. Maybe we should first add a way to download the existing docker logs with a link on the extensions manager page per #1611.

I had to resort to telling a user how to manually use the kraken API:

Navigate your web browser to http://blueos.local:9134/v2.0/list_containers and look for something that contains the words “sonarview” and the “name” field. It should be something like (maybe exactly) "/extension-nicknothomsonarview1100".

If that’s what it is, then go to the following URL (if the name is different, adjust this URL accordingly):

http://blueos-dan.local:9134/v2.0/log?container_name=/extension-nicknothomsonarview1100