Backported chnages

• Upgrade to Scala.js 1.22.0. #26389
• Stop using custom fonts for Scaladoc #26393
• Bump Scala CLI to 1.15.0 (was 1.14.0) and coursier to 2.1.25-M26 (was 2.1.25-M25) #26432
• Vendor REPL dependencies #26433
• Deprecate JPath use in Quotes #26446
• Migrate Scala CLI's using directive parser to a compiler module #26449
• Refactor directives-parser #26461
• Minor using directives parser improvements #26460
• Scaladoc snippets: fix Show all lines & Scastie popup theme bugs #26165
• Do not warn on dollars in Java names #26303
• Don't skip generic signature for constructors with generic using parameters #26302
• Don't eliminate var used by anonfun #26360
• Erase more aliases of Unit as result type to void. #26252
• Reset dirty unimported state after findRef #26412
• Fix :help regressions #26301
• Fix generic signature of trait val setter #26374
• Fixes #25754: Preserve apply result type after beta reducing through opaque proxies #25988
• Fix memberType for constructor params #25669
• Fix #25866: match-alias subtyping and wildcard appliedTo #25981

Contributors

Thank you to all the contributors who made this release possible 🎉

According to git shortlog -sn --no-merges 3.9.0-RC1..3.9.0-RC2 these are:

    10	Solal Pirelli
     7	Wojciech Mazur
     6	Piotr Chabelski
     3	Sébastien Doeraene
     1	Jamie Thompson
     1	Oliver Bračevac
     1	Oron Port
     1	Som Snytt
     1	Zieliński Patryk