docs(streams): improve docs for stabilization

[magurotuna]

This commit improves docs of the streams module.

Towards #3764

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 93.87755% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 92.35%. Comparing base (d13ef17) to head (fd5b75b).

Files	Patch %	Lines
streams/buffer.ts	95.00%	1 Missing :warning:
streams/delimiter_stream.ts	75.00%	1 Missing :warning:
streams/text_delimiter_stream.ts	85.71%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4852      +/-   ##
==========================================
- Coverage   92.35%   92.35%   -0.01%     
==========================================
  Files         487      487              
  Lines       41539    41562      +23     
  Branches     5405     5405              
==========================================
+ Hits        38363    38384      +21     
- Misses       3120     3122       +2     
  Partials       56       56              

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