Added RPE logo and updated help with readthedocs link

[ravikiranchollangi]

Motivate of the pull request

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

Describe the technical details

What is currently done? (Provide issue link if applicable)

Missing RPE logo and help pointed to the readme doc.

What does this pull request change?

Added RPE logo and readthedocs link as userguide under help menu.

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
• 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 68.78%. Comparing base (40dad14) to head (e82b7af).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #272   +/-   ##
=======================================
  Coverage   68.78%   68.78%           
=======================================
  Files         110      110           
  Lines        9035     9035           
  Branches      402      402           
=======================================
  Hits         6215     6215           
  Misses       2820     2820           

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