Add pull-request note for the first-time contributors

[pavoljuhas]

Here is a text for the initial response to first-time contributors
asking them to perform local testing of their PR. It is hoped that
this process would encourage a due level of attention to the
correctness and quality of proposed changes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.63%. Comparing base (5975e16) to head (cdb60b3).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8016   +/-   ##
=======================================
  Coverage   99.63%   99.63%           
=======================================
  Files        1110     1110           
  Lines       99749    99755    +6     
=======================================
+ Hits        99386    99394    +8     
+ Misses        363      361    -2     

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[dstrain115]

Seems like a reasonable counter-measure to me.

[mhucka]

@dstrain115 Thanks for reviewing it. Just in case it was missed: this is still a draft PR. We will probably do this, but are still discussing this and other possible measures.

[pavoljuhas]

@mhucka - FYI, I just discussed this with Doug so that's how it got reviewed. Would you mind if we merge this and start testing this approach with new contributors?
(If you feel the note should be placed at a better path I am all for that.)

[mhucka]

@mhucka - FYI, I just discussed this with Doug so that's how it got reviewed. Would you mind if we merge this and start testing this approach with new contributors? (If you feel the note should be placed at a better path I am all for that.)

OK, yes, let's go ahead. IMHO something like this PR is good to do in any case.