Add next/previous incident buttons in cite header

[lmcnulty]

First item of #2685.

Putting the links in the header to avoid taking up so much space.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.23%. Comparing base (2b8bf51) to head (3759062).
Report is 1 commits behind head on staging.

Additional details and impacted files

@@             Coverage Diff             @@
##           staging    #2689      +/-   ##
===========================================
- Coverage    86.31%   82.23%   -4.09%     
===========================================
  Files          248      244       -4     
  Lines         8338     8228     -110     
  Branches      2625     2596      -29     
===========================================
- Hits          7197     6766     -431     
- Misses        1048     1346     +298     
- Partials        93      116      +23     

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[cypress]

2 failed tests on run #2184 ↗︎

2

481

244

0

0

Details:

Add next/previous incident buttons in cite header
Project: aiid-site	Commit: 375906294f
Status: Failed	Duration: 17:31 💡
Started: Apr 24, 2024 3:54 PM	Ended: Apr 24, 2024 4:11 PM

  cypress/e2e/integration/cite.cy.js • 2 failed tests • Cypress e2e tests

View Output

Test		Artifacts
Cite pages > Should disable Previous and Next incident buttons on first and last incidents		Test Replay
Cite pages > Should disable Previous and Next incident buttons in header on first and last incidents		Test Replay

Review all test suite changes for PR #2689 ↗︎

[pdcp1]

In general, it looks good to me. I recommend adding tests to these buttons on cite.cy.js.
Please take into consideration this edge-case scenario for the first and last incident in the database.

FYI: I fixed it for the buttons at the bottom in this PR

[pdcp1]

Please add tests to these new buttons. You can copy the test structure from this PR