Make use of Gradle 8.14's `nativeImageCapable = true` if `toolchainDetection = true`

[sschuberth]

If this project's Gradle plugin's toolchainDetection is set to true, then toolchain detection should specify nativeImageCapable = true when using Gradle 8.14, see the release notes.

[cromefire]

Not sure if automatically enabling it is quite they way to do it, but it should definitely be documented that that's the way to go, now that that's a thing,