Biographical notes should be indexed on the site

[faithc]

User story

As a user, I would like to be able to find information about collection creators that archivists include in biographical/ historical notes. This is especially true for information about individuals and organizations that aren't well known and that do not have a significant online presence.

Acceptance criteria

• If this change touches any of the files referenced in .rubocop_todo.yml create a new ticket to address the rubocop todo.
• I can successfully use this feature with Voice Over in Safari.
• I have checked this feature using one of the following browser extensions and confirmed that it does not add any level A or level AA issues:
  • axe dev tools
  • Lighthouse
  • Wave
• ...

Concrete example

https://findingaids.princeton.edu/catalog/C0140_c47464-70338?onlineToggle=false

Implementation notes, if any

Biographical notes are associated with agent records in ArchivesSpace.