Add capture checking to scala.runtime

Mostly imports here

Author: natsukagami

library/src/scala/runtime/$throws.scala

@@ -1,4 +1,7 @@
 package scala.runtime
+
+import language.experimental.captureChecking
+
 import annotation.experimental
 
 /** A helper type to allow syntax like

library/src/scala/runtime/Arrays.scala

@@ -1,5 +1,7 @@
 package scala.runtime
 
+import language.experimental.captureChecking
+
 import scala.annotation.unused
 import scala.reflect.ClassTag
 

library/src/scala/runtime/EnumValue.scala

@@ -1,5 +1,7 @@
 package scala.runtime
 
+import language.experimental.captureChecking
+
 transparent trait EnumValue extends Product, Serializable:
   override def canEqual(that: Any) = this eq that.asInstanceOf[AnyRef]
   override def productArity: Int = 0

library/src/scala/runtime/FunctionXXL.scala

@@ -1,5 +1,7 @@
 package scala.runtime
 
+import language.experimental.captureChecking
+
 /** A function with all parameters grouped in an array. */
 trait FunctionXXL {
 

library/src/scala/runtime/LazyVals.scala

@@ -1,5 +1,6 @@
 package scala.runtime
 
+import language.experimental.captureChecking
 import java.util.concurrent.CountDownLatch
 
 import scala.annotation.*

library/src/scala/runtime/MatchCase.scala

@@ -1,5 +1,7 @@
 package scala.runtime
 
+import language.experimental.captureChecking
+
 /** A type constructor for a case in a match type.
  */
 final abstract class MatchCase[Pat, +Body]

library/src/scala/runtime/Scala3RunTime.scala

@@ -1,5 +1,7 @@
 package scala.runtime
 
+import language.experimental.captureChecking
+
 object Scala3RunTime:
 
   // Called by inline def assert's. Extracted to minimize the bytecode size at call site.