Add title field to rule

[jonathonherbert]

What does this change?

Adds a title field to rule. The title is useful in the style guide:

How to test

Create a rule, add a title, refresh the page: the title should appear.

Todo

• [ ] Title in the search index
• [ ] Title in the results table
• [ ] Conditionally display the title if the rule is a style guide entry (how to determine?)

[github-actions[bot]]

Deploy build 2849 of Editorial Tools::Typerighter to CODE

All deployment options

• Deploy build 2849 of Editorial Tools::Typerighter to CODE
• Deploy parts of build 2849 to CODE by previewing it first
• What's on CODE right now?

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From guardian/actions-riff-raff.