Rename srcgen sbt plugin keys

[naree]

What this does?

Rename plugin keys to be prefixed with muSrcGen to follow the plugins best practices guideline.
https://www.scala-sbt.org/1.x/docs/Plugins-Best-Practices.html

Checklist

• Reviewed the diff to look for typos, println and format errors.
• Updated the docs accordingly.

[codecov]

Codecov Report

Merging #764 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #764   +/-   ##
=======================================
  Coverage   71.52%   71.52%           
=======================================
  Files          68       68           
  Lines        1036     1036           
  Branches       13       13           
=======================================
  Hits          741      741           
  Misses        295      295

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[fedefernandez]

@naree are you planing to update the docs in a following PR?

[naree]

@fedefernandez I noticed that @cb372 was working on documentation including removing reference to the idl generation. I am planning to check with @cb372 after this PR is merged to see if any further changes to documentation is necessary.

[fedefernandez]

Thanks!

[naree]

Related documents updated #765