content(addManifest): remove badges from readme

[brunobuddy]

Description

This PR improves the README.md file generated when using the npx add-manifest script. It removes all the badges from the README.

How can it be tested?

Just see the file before and after.

Check list before submitting

• This PR is wrote in a clear language and correctly labeled
• I created the related changeset for my changes with npx changeset
• I have performed a self-review of my code (no debugs, no commented code, good naming, etc.)
• I wrote the relative tests
• I created a PR for the documentation if necessary and attached the link to this PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.91%. Comparing base (f32492d) to head (b002cc4).
Report is 144 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #301       +/-   ##
===========================================
+ Coverage   56.39%   66.91%   +10.52%     
===========================================
  Files          42       51        +9     
  Lines        1204     1451      +247     
  Branches      298      331       +33     
===========================================
+ Hits          679      971      +292     
+ Misses        486      478        -8     
+ Partials       39        2       -37     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.