build: separate compiler and libs

cl/_testrt/closureiface/in.go

@@ -1,14 +0,0 @@
-package main
-
-func main() {
-	var m int = 200
-	fn := func(n int) int {
-		return m + n
-	}
-	var i any = fn
-	f, ok := i.(func(int) int)
-	if !ok {
-		panic("error")
-	}
-	println(f(100))
-}