feat: Storage Box support no longer experimental

[phm07]

Storage Boxes are no longer experimental, so the warning has been removed.

Closes #1202

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.27%. Comparing base (4093c33) to head (b60a311).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1267      +/-   ##
==========================================
- Coverage   72.43%   72.27%   -0.16%     
==========================================
  Files         311      311              
  Lines       11398    11398              
==========================================
- Hits         8256     8238      -18     
- Misses       2210     2219       +9     
- Partials      932      941       +9     

Flag	Coverage Δ
e2e	51.82% <100.00%> (-0.27%)	⬇️
unit	67.12% <100.00%> (-0.16%)	⬇️

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