Play Framework

fix(gradle-plugin): wire --https.port through to the launched app (PF-127)

The play shim already translated --https.port=X to -PhttpsPort=X, but the
Gradle plugin only ever read httpPort, so the flag was silently dropped and
no HTTPS listener was started. The framework runtime (play.server.Server)
parses --https.port=X from the launched app's argv via getOpt(), exactly like
--http.port=X, so wire httpsPort through both launch paths mirroring httpPort:

- registerPlayJvmTask (foreground: playRun/playTest) now appends
  --https.port=$it when -PhttpsPort is supplied.
- PlayStartTask/PlayRestartTask gain an httpsPort Property, set from the
  httpsPort gradle property, forwarded through spawnPlay as --https.port.

The shim needed no change; its existing -PhttpsPort translation is now
consumed instead of ignored.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
(cherry picked from commit 9156b5de5b5c3b6d90d36fa8177936ec9bda63fd)