Add link to the documentation about Ibis datatypes

[deepyaman]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.47%. Comparing base (812b2a8) to head (eeacc75).
⚠️ Report is 358 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2057      +/-   ##
==========================================
- Coverage   94.28%   93.47%   -0.81%     
==========================================
  Files          91      135      +44     
  Lines        7013    10444    +3431     
==========================================
+ Hits         6612     9763    +3151     
- Misses        401      681     +280     

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