Connect to browser using CDP

[elacuesta]

Closes #207

Tasks:

• [x] Implementation
• [x] Tests
• [x] Docs

This change only covers BrowserType.connect_over_cdp, it does not cover BrowserType.connect.

[codecov[bot]]

Codecov Report

Merging #227 (4a615ae) into main (f1004bd) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #227   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          392       410   +18     
=========================================
+ Hits           392       410   +18     

Files Changed	Coverage Δ
scrapy_playwright/handler.py	100.00% <100.00%> (ø)

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