Add docs for OSS-Fuzz integration

[correctmost]

Type of Changes

	Type
✓	📜 Docs

Description

Add documentation for the OSS-Fuzz integration.

Refs pylint-dev/astroid#2511

(This documentation is based on documentation I previously wrote for librsvg: https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/983.)

[Pierre-Sassoulas]

Great, I was wondering how to access the internal report, now I don't :D

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.80%. Comparing base (18f03b7) to head (620f782).
Report is 103 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9896   +/-   ##
=======================================
  Coverage   95.80%   95.80%           
=======================================
  Files         174      174           
  Lines       18939    18918   -21     
=======================================
- Hits        18144    18124   -20     
+ Misses        795      794    -1     

see 2 files with indirect coverage changes

---- 🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests