LIBTREATDB-131 pull modals out from views

[Janell-Huyck]

Jira Issue: LIBTREATDB-131

What’s changed

• Extracted modals into their own partials under app/views/conservation_records/modals/ (in-house, external, conservators/technicians).
• Simplified each modal to use local: true and Bootstrap’s data attributes—removed duplicated markup in show.html.erb.

Why

• Pulling out each modal into a dedicated partial makes it easier to maintain and reason about the markup.
• Using local: true and data attributes exclusively ensures Rails 6 compatibility now and smooth upgrade paths to Rails 7.

Test refactor

• Introduced shared contexts and examples in spec/support/conservation_records_shared_examples.rb.
• Split the giant request spec into two focused files (index_all_conservation_records_spec.rb and show_specific_conservation_record_spec.rb) so each test's function is clearer.
• Switched all link/button assertions in request specs to Nokogiri-based selectors (no more Capybara matchers).

All existing behaviors are preserved; this simply reorganizes the view code and tightens up our test coverage for both the index and show pages.

[Janell-Huyck]

public/.well-known/appspecific/com.chrome.devtools.json is simply an empty file to quiet an error being generated by the web browser.

[Janell-Huyck]

When run locally with the updated package.json for Babel version 7.27, the new extracted modals open, save, and auto-close appropriately and the database is updated correctly. Updating to Babel 7.27 is beyond the scope of this PR, but this PR needs to be merged before the Babel PR can be.

[Janell-Huyck]

PR relocated to git.uc.edu