Release 10.1

[cristianoc]

First:

• Publish stable rc candidate rc.3
• Round of testing of rc candicate (especially V4), check that no further changes are needed/planned

Then:

• Final check on editor integration Create interface file with JSX 4 component rescript-vscode#617
• Final check on genType: repeat Update genType snapshot tests. #5764
• Docs Create v10.1 docs rescript-lang.org#568
• Remaining tasks from Prepare 10.1 release rescript-lang.org#633