Add Exact TN to docs

[multiphaseCFD]

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• All new features must include a unit test.
  If you've fixed a bug or added code that should be tested, add a test to the
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• Ensure that the test suite passes, by running make test.

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  change, and including a link back to the PR.

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---

Context:

[sc-72893]

Description of the Change:

Benefits:

Possible Drawbacks:

Related GitHub Issues:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.45%. Comparing base (954a6e7) to head (10faba1).
Report is 1 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (954a6e7) and HEAD (10faba1). Click for more details.

HEAD has 35 uploads less than BASE

Flag	BASE (954a6e7)	HEAD (10faba1)
	41	6

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #1021       +/-   ##
===========================================
- Coverage   95.50%   27.45%   -68.06%     
===========================================
  Files         178       29      -149     
  Lines       28357     2637    -25720     
===========================================
- Hits        27083      724    -26359     
- Misses       1274     1913      +639     

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[maliasadi]

Thanks @multiphaseCFD! Ping me for the second round 🙂

[maliasadi]

LGTM! ⭐ We need one more approval from @DSGuala or @AntonNI8 to merge the PR.