feature: add zero dim array storing the element in a type parameter

[nsajko]

Fixes #32

[codecov]

Codecov Report

❌ Patch coverage is 94.44444% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 98.82%. Comparing base (76e1897) to head (aad320f).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ZeroDimensionalArrays.jl	94.44%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main      #42      +/-   ##
===========================================
- Coverage   100.00%   98.82%   -1.18%     
===========================================
  Files            1        1              
  Lines           69       85      +16     
===========================================
+ Hits            69       84      +15     
- Misses           0        1       +1     

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