Add tests for the Jacobi ladder operators

[dlfivefifty]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (8462dd4) to head (549acaf).
⚠️ Report is 31 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ClassicalOrthogonalPolynomials.jl	0.00%	2 Missing ⚠️
src/classical/jacobi.jl	0.00%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (8462dd4) and HEAD (549acaf). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (8462dd4)	HEAD (549acaf)
	6	5

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #234       +/-   ##
==========================================
- Coverage   91.48%   0.00%   -91.49%     
==========================================
  Files          19      19               
  Lines        1750    1710       -40     
==========================================
- Hits         1601       0     -1601     
- Misses        149    1710     +1561     

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