Docs: passing badge to README

[shivaahir158]

Motivate of the pull request

• To address an existing issue. If so, please provide a link to the issue:
• Breaking new feature. If so, please describe details in the description part.

Describe the technical details -

Added 'docs: passing" badge to readme (redirects to readthedocs for RPE link) alongside build and publish RPE and codecov badge.

Which part of the code base require a change

• Frontend:
• Backend:
• Library: <Specify the library name, e.g. npm packages>
• Plug-in: <Specify the plugin name, e.g. Webpack, jtest>
• Documentation: updated README
• Regression tests
• Continuous Integration (CI) scripts

Impact of the pull request

• Require a change on Quality of Results (QoR)
• Break backward-compatibility. If so, please list who may be influenced.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.18%. Comparing base (655e3d0) to head (1a85f08).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #244   +/-   ##
=======================================
  Coverage   70.18%   70.18%           
=======================================
  Files         110      110           
  Lines        8607     8607           
=======================================
  Hits         6041     6041           
  Misses       2566     2566           

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