Support global config

[RyouMon]

global config can apply to all spiders

global:
  ...
pixiv:
  ...

[codecov]

Codecov Report

Attention: Patch coverage is 92.63158% with 7 lines in your changes missing coverage. Please review.

Project coverage is 75.50%. Comparing base (b422694) to head (e421690).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/favorites_crawler/commands/crawl.py	33.33%	4 Missing ⚠️
src/favorites_crawler/commands/login.py	0.00%	3 Missing ⚠️

@@            Coverage Diff             @@
##             main      #62      +/-   ##
==========================================
+ Coverage   73.92%   75.50%   +1.58%     
==========================================
  Files          34       35       +1     
  Lines        1112     1188      +76     
==========================================
+ Hits          822      897      +75     
- Misses        290      291       +1     

Files with missing lines	Coverage Δ
src/favorites_crawler/utils/config.py	100.00% <100.00%> (+21.73%)	⬆️
tests/test_utils/test_config.py	100.00% <100.00%> (ø)
src/favorites_crawler/commands/login.py	38.88% <0.00%> (-2.29%)	⬇️
src/favorites_crawler/commands/crawl.py	69.56% <33.33%> (-4.86%)	⬇️