Write Metatags to Next Build output

[timcosgrove]

Requirements

We want to include metatags in our pages so that various systems can make use of the metadata connected to those pages.

Acceptance criteria

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1. Metatags appear in the static HTML generated by Next Build
2. Metatags match an equivalent Content Build page, with exceptions noted below
3. noindex is added for non-prod environments
4. Metatags should be implemented as its own component

Background & implementation details

Content Build template for Metatags: https://github.com/department-of-veterans-affairs/content-build/blob/main/src/site/includes/metatags.drupal.liquid

Filters in Content Build which manipulate metatag data: https://github.com/department-of-veterans-affairs/content-build/blob/main/src/site/filters/liquid.js

The order of the Metatags does not need to match Content Build.

Meta robots noindex should be added conditionally for non-prod environments: https://github.com/department-of-veterans-affairs/content-build/blob/main/src/site/includes/header.html#L27

Implementation tasks

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1. Use this if it helps you or feel free to delete.