[x] Add single term template for Urban Climate Action hub
[x] Updates to collection to add sub heading field and new 'hub' collection type
[x] Add new external link content type
[x] Templates for external link card display
[x] Add form block type for use with terms, add form type field + Twig for block with JS
[x] Update taxonomy-term--collection.html.twig to add Twig blocks for main areas
Note that we can now refactor custom term templates to extend collection and add twig blocks where needed
[x] set collectionType = field_collection_type for use in tab label. Now applies to all collections
[x] update collection tab JS to it's possible to link directly to the overview
[x] Add content blocks to term (view/tag and form) Use /term/44796 for the tag
[x] Adjust tag view field settings to allow user to limit number of cards, add new hub block to view to allow External resource content
See https://www.iied.org/collection/urban-climate-justice