Change detection of libretexts.org special pages and add log

[benoit74]

Fix #87

Changes: instead of using page title, analyzing html body to detect libretexts.org special pages

Tested on page mentioned in issue:

Also tested successfully on page 15834 of https://geo.libretexts.org

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 43.96%. Comparing base (dfe4246) to head (a86df2c).

Files with missing lines	Patch %	Lines
scraper/src/mindtouch2zim/processor.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@                  Coverage Diff                   @@
##           assets_reliability      #97      +/-   ##
======================================================
- Coverage               44.05%   43.96%   -0.09%     
======================================================
  Files                      17       17              
  Lines                    1051     1053       +2     
  Branches                  149      149              
======================================================
  Hits                      463      463              
- Misses                    576      578       +2     
  Partials                   12       12              

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[rgaudin]

LGTM