Doc Updates: Device Agent

[joepavitt]

Description

In addition to the below, this also fixes a error count check that has meant docs tests have passed when only one error is found. This was disguising a reported error for /support - which is valid for the website, and just needed adding to our exemption list.

Core Work:

Extracts Device documentation into separate files, driven by the phases that a user will go through in order to install, configure, run and deploy to Devices.

Also utilises the new navOrder and redirect functionality introduced in FlowFuse/website#943 for the documentation

Related Issue(s)

Part of FlowFuse/website#842

Checklist

• I have read the contribution guidelines
• Documentation has been updated

Labels

• Backport needed? -> add the backport label

[joepavitt]

Not sure if we're backporting these documentation changes, don't think we need too personally, as will also be a lot more coming, but I'm breaking them into smaller PRs for reviewability.

[joepavitt]

Will fix these doc link errors found in the tests next week, I'm calling it a night for now (and am out til Thursday), but just wanted to at least get the basic restructure in.

Will also need to reverse the navOrder values given we're now reversing the order (see: FlowFuse/website#943 (comment))

[joepavitt]

@ZJvandeWeg this is good to go now - note npm run test:docs fix too.

[knolleary]

This PR has removed https://flowforge.com/docs/user/devices/ but I don't see any redirects for that URL to take users to the new URL. That will break all existing links.

There are 6 links within the FlowForge application to that URL this PR will break. We cannot backport these changes without a redirect as well.