fix: Handle encoding errors in selectolax by switching to BeautifulSoup

[ideaflow]

selectolax 会默认将网页字符串视为'utf-8'编码，如果不是这个编码会报错，而BeautifulSoup可以更自动地处理编码问题，所以如果修复html的步骤遇到编码错误，则替换为BeautifulSoup

[codecov]

Codecov Report

❌ Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...it/main_html_parser/simplify_html/simplify_html.py	57.14%	3 Missing ⚠️

❌ Your patch check has failed because the patch coverage (57.14%) is below the target coverage (85.00%). You can increase the patch coverage or adjust the target coverage.

@@            Coverage Diff             @@
##              dev     #569      +/-   ##
==========================================
- Coverage   90.97%   90.85%   -0.13%     
==========================================
  Files         102      106       +4     
  Lines        8890     9220     +330     
==========================================
+ Hits         8088     8377     +289     
- Misses        802      843      +41     

Files with missing lines	Coverage Δ
...it/main_html_parser/simplify_html/simplify_html.py	82.84% <57.14%> (-0.17%)	⬇️

... and 10 files with indirect coverage changes

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