feat: add recursiveResolveTasks

[lpatiny]

recursiveResolve receives promises, which are already running by the time it walks the object, so a concurrency limit on it would cap nothing. recursiveResolveTasks takes the same tree holding functions instead, and calls them at most concurrency at a time - the limit then applies to the work itself. A failing task rejects the call and stops any further one from starting.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.42%. Comparing base (750ba0e) to head (8fc0fd9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #406      +/-   ##
==========================================
+ Coverage   97.40%   97.42%   +0.01%     
==========================================
  Files         215      216       +1     
  Lines        4320     4353      +33     
  Branches     1093     1102       +9     
==========================================
+ Hits         4208     4241      +33     
  Misses        109      109              
  Partials        3        3              

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