Issue 12 narr tax

[mariacha]

What issue(s) does this solve?

• Issue Number: https://github.com/wri/wri-espanol/issues/12

What is the new behavior?

• Adds two new tokens for Narrative Taxonomy fields, which are smarter about published status and fallback.
• Needs update hooks for config changes.
• Needs update hook for narrative taxonomies. Probably easiest to do as .yml files within a collection...

Profile requirements:

• Does deploying this change require a change to config at the site level (choose one)?
  • No config change is required.
  • Yes, and I have written an update hook to apply these config changes.
  • Yes, and I've included updating instructions to be added to the release notes. The next release will need to be a major version increase. (Only do this in special cases.)

Site-level pull requests for testing. Only merge when these PRs are approved:

Create or update any site-level pull requests following the documentation

• Flagship PR:

Checked on develop (TA to do)

• Brasil
• China
• Indonesia