feat: add slasher evidence core#6667

yyswhsccc wants to merge 2 commits into

Scottcjn:mainScottcjn/Rustchain:mainfrom

yyswhsccc:bounty-radar/issue-2369-slasher-core-pryyswhsccc/Rustchain:bounty-radar/issue-2369-slasher-core-prCopy head branch name to clipboard