Support paying DOT as a fee

[KitHat]

Adding support for paying dot as a fee

PR Checklist

• Tests
• Documentation
• Fixes for DOT as a fee  openzeppelin-pallet-abstractions#70 merged
• branches updated

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.16%. Comparing base (67c2f2b) to head (52d84c0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #404      +/-   ##
==========================================
+ Coverage   77.51%   78.16%   +0.64%     
==========================================
  Files          17       17              
  Lines        1895     1951      +56     
  Branches     1895     1951      +56     
==========================================
+ Hits         1469     1525      +56     
  Misses        363      363              
  Partials       63       63              

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