Add an importer for the text format taken as input by flamegraph.pl.

[fqueze]

gradle-profiler can generate these profiles when using the async-profiler format or the jfr format.
Example imported profiles for the async-profiler format and for the jfr format.

[codecov]

Codecov Report

Attention: Patch coverage is 13.33333% with 65 lines in your changes missing coverage. Please review.

Project coverage is 85.66%. Comparing base (7f30744) to head (67aff3c).

Files with missing lines	Patch %	Lines
src/profile-logic/import/flame-graph.js	12.32%	56 Missing and 8 partials ⚠️
src/profile-logic/process-profile.js	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5359      +/-   ##
==========================================
- Coverage   85.84%   85.66%   -0.19%     
==========================================
  Files         312      313       +1     
  Lines       29827    29902      +75     
  Branches     8213     8223      +10     
==========================================
+ Hits        25605    25615      +10     
- Misses       3627     3684      +57     
- Partials      595      603       +8     

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