* reset the JDK to the default (21.0.1-open) when no prepare script is provided
* leaderboard improvements - sorting and content
* run sdk install once at the beginning of the script for all the SDKs detected in any of the evaluated prepare scripts
* remove unnecessary code and tweak doc comments
* one more nit
* Don't print rankings values when only 1 fork is being evaluated
* It's been a few hours, so I now have some more rate limit :)
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Co-authored-by: Jason Nochlin <hundredwatt@users.noreply.github.com>
