Rename smart wallet

[whoabuddy]

• acct where we need a short name
• account instead of smart wallet
• user agent account if specificity is needed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.21%. Comparing base (33497d6) to head (91f0cd1).
Report is 13 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #65   +/-   ##
=======================================
  Coverage   70.21%   70.21%           
=======================================
  Files          84       84           
  Lines        2911     2911           
  Branches      429      429           
=======================================
  Hits         2044     2044           
  Misses        861      861           
  Partials        6        6           

Files with missing lines	Coverage Δ
contracts/aibtc-user-agent-account.clar	92.37% <100.00%> (ø)

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