Add 3.7 and 3.7-migration

Author: hamzaremmal

Diff for: compiler/src/dotty/tools/dotc/config/SourceVersion.scala

@@ -12,6 +12,7 @@ enum SourceVersion:
   case `3.4-migration`, `3.4`
   case `3.5-migration`, `3.5`
   case `3.6-migration`, `3.6`
+  case `3.7-migration`, `3.7`
   // !!! Keep in sync with scala.runtime.stdlibPatches.language !!!
   case `future-migration`, `future`
 

Diff for: library/src/scala/runtime/stdLibPatches/language.scala

@@ -300,6 +300,21 @@ object language:
   @compileTimeOnly("`3.6` can only be used at compile time in import statements")
   object `3.6`
 
+  /** Set source version to 3.7-migration.
+    *
+    * @see [[https://docs.scala-lang.org/scala3/guides/migration/compatibility-intro.html]]
+    */
+  @compileTimeOnly("`3.7-migration` can only be used at compile time in import statements")
+  object `3.7-migration`
+
+  /** Set source version to 3.7
+    *
+    * @see [[https://docs.scala-lang.org/scala3/guides/migration/compatibility-intro.html]]
+    */
+  @compileTimeOnly("`3.7` can only be used at compile time in import statements")
+  object `3.7`
+
+
   // !!! Keep in sync with dotty.tools.dotc.config.SourceVersion !!!
   // Also add tests in `tests/pos/source-import-3-x.scala` and `tests/pos/source-import-3-x-migration.scala`
 

Diff for: tests/pos/source-import-3-7-migration.scala

@@ -0,0 +1 @@
+import language.`3.7-migration`

Diff for: tests/pos/source-import-3-7.scala

@@ -0,0 +1 @@
+import language.`3.7`