feat(x): add xIsArray and improve types of xCheck

[targos]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.35%. Comparing base (78dc00d) to head (bbce43e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #396   +/-   ##
=======================================
  Coverage   97.35%   97.35%           
=======================================
  Files         212      213    +1     
  Lines        4232     4240    +8     
  Branches     1054     1061    +7     
=======================================
+ Hits         4120     4128    +8     
  Misses        109      109           
  Partials        3        3           

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