Add FCs

[dfarr]

TFC: top level function call
LFC: local function call
RFC: remote function call

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.21488% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 81.19%. Comparing base (19549fd) to head (dea33f3).

Files	Patch %	Lines
lib/core/promises/promises.ts	50.00%	2 Missing ⚠️
lib/generator.ts	86.66%	2 Missing ⚠️
lib/async.ts	96.00%	1 Missing ⚠️
lib/core/execution.ts	85.71%	1 Missing ⚠️
lib/resonate.ts	96.29%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #117      +/-   ##
==========================================
- Coverage   81.23%   81.19%   -0.04%     
==========================================
  Files          22       24       +2     
  Lines        1332     1356      +24     
  Branches      361      341      -20     
==========================================
+ Hits         1082     1101      +19     
+ Misses        250      247       -3     
- Partials        0        8       +8     

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