add conda in docs

[Fanchengyan]

update docs: add conda for installation and badges

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.80%. Comparing base (d656354) to head (fd8b2be).
Report is 25 commits behind head on main.

@@           Coverage Diff           @@
##             main       #7   +/-   ##
=======================================
  Coverage   89.80%   89.80%           
=======================================
  Files           7        7           
  Lines         785      785           
=======================================
  Hits          705      705           
  Misses         80       80           

---

🚨 Try these New Features:

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