Implement API for errors

Author: anatoliykmetyuk

library/src/scala/compiletime/testing/package.scala

@@ -4,6 +4,22 @@ import scala.quoted._
 
 package object testing {
 
+  case class Error(message: String, lineContent: String, column: Int, kind: ErrorKind)
+  object Error
+    given Liftable[Error]
+      def toExpr(e: Error) =
+        '{Error(${Expr(e.message)}, ${Expr(e.lineContent)}, ${Expr(e.column)}, ${Expr(e.kind)})}
+
+  enum ErrorKind
+    case Parse, Compile
+
+  object ErrorKind
+    given Liftable[ErrorKind]
+      import ErrorKind._
+      def toExpr(e: ErrorKind) = e match
+        case Parse => '{Parse}
+        case Compile => '{Compile}
+
   /** Whether the code type checks in the current context?
    *
    *  @param code The code to be type checked