Add task list page template

[frankieroberto]

This adds a Task list page to the common templates plugin, to make it easier for people to prototype task lists using the GOV.UK Prototype Kit.

See Decide what to do with the Prototype Kit Task List plugin.

[frankieroberto]

@colinrotherham @stevenjmesser this can be merged and released now.

It bumps the major version of the plugin, as it now depends on v5 of govuk-frontend.

[romaricpascal]

Nice addition! Wondering if we can mention that this template 'requires GOV.UK Frontend >v5.0.0' (in the template's name maybe?) to reduce risk of confusions for users trying to use it with 4.x., but not really a blocker.

Worth knowing that people will be able to downgrade using the following link as well (to anticipate support answers): http://localhost:3000/manage-prototype/plugins/install?package=%40govuk-prototype-kit%2Fcommon-templates&version=1.2.2 (or npm install @govuk-prototype-kit/common-templates@1.2.2 if they don't mind the command line).

[romaricpascal]

@frankieroberto Not sure if your thumbs up is for the way to install the previous version or adding extra info to the name, please let me know which. I've quickly mocked up some extra info next to the name, if that's helpful:

• "for GOV.UK Frontend >=5.0.0"

• or, slightly more compact, "for GOV.UK Frontend ≥5.0.0"

[frankieroberto]

@frankieroberto Not sure if your thumbs up is for the way to install the previous version or adding extra info to the name, please let me know which. I've quickly mocked up some extra info next to the name, if that's helpful:

• "for GOV.UK Frontend >=5.0.0"

Done. It's a big ugly, but clarity beats aesthetics here, right?! 😄