(1.5.4) Tippy tooltips, updated translations

Additions

• Tippy tooltips when hovering over buttons
• Add caveat for userbar model links
• Add keywords for BackgroundImageFieldAdapter
• Type annotations to frontend.js
• Adapter base JS class now inherits from EventTarget
• Add {% fedit_userbar instance %} template- tag
• View to re- fetch Adapter HTML

Updates

• Updated translations
• Update actions wagtail 6.1 workflow for wagtail==6.1rc2
• Actualise translations

Changes

• README TOC section inside details
• Improve internal workings of Keyword class.
• Improve Adapter.get_header_title strings by wrapping instance in single quotes.
• Move View error messages to errors.py
• Improve help command based on settings
• Tiny improvements to CSS selectors / attributes
• Simplify AdapterNode.render
• Button visibility based on permissions / URL availability for FeditAdapterAdminLinkButton