Token urls

[tombola]

Uses a token based URL to allow the sharing link to be a publically accessible (unguessable) URL, so that the content can be reviewed by someone outside of organisation/network.

Additions

• Option to use a token based url to share content rather than the same wagtail path at the sharing site

Todos

• Add tests for token creation and view

Checklist

• Changes are limited to a single goal (no scope creep)
• Code can be automatically merged (no conflicts)
• Code follows the standards laid out in the front end playbook
• Passes all existing automated tests
• New functions include new tests
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged
• Visually tested in supported browsers and devices
• Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)

[willbarton]

One quick thing at a glance, but this looks really cool!

[tombola]

I have rebased from upstream master to resolve CI complaints.

[zerolab]

@tombola another rebase? would be great to get this in an official release

[tombola]

After rebasing I am not quite sure why this is failing.

There is an invocation error for tox and coverage is asking for a token, @willbarton does this relate to a recent upstream change perhaps?

[willbarton]

@tombola it looks like you've got an import order linting failure in a couple of spots and it looks like we need to include GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} in this section of our GitHub actions. For that last one, you just need another rebase. Sorry about that!

[tombola]

@willbarton this one got away from me, and realistically I am not going to be able to look at it anytime soon, feel free to close if necessary.

[tombola]

Closed in favour of #47, thanks @zerolab