Scan oversized lines by chunks

[babenek]

Description

Please include a summary of the change and which is fixed.

• Add chunk-based scan for oversized lines with overlap to do not skip a credential between chunks
• slowdown ~26%

How has this been tested?

Please describe the tests that you ran to verify your changes.

• UnitTest
• Benchmark

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 78.57143% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 90.53%. Comparing base (21a54c9) to head (903ea75).

Files	Patch %	Lines
credsweeper/scanner/scan_type/scan_type.py	66.66%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #522   +/-   ##
=======================================
  Coverage   90.53%   90.53%           
=======================================
  Files         127      127           
  Lines        4394     4397    +3     
  Branches      707      707           
=======================================
+ Hits         3978     3981    +3     
  Misses        274      274           
  Partials      142      142           

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[babenek]

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