scanner: cleanup, only v.parser now depends on v.scanner

vlib/v/errors/errors.v

@@ -0,0 +1,25 @@
+module errors
+
+import v.token
+
+pub enum Reporter {
+	scanner
+	parser
+	checker
+	gen
+}
+
+pub struct Error {
+	message   string
+	file_path string
+	pos       token.Position
+	reporter  Reporter
+	backtrace string
+}
+
+pub struct Warning {
+	message   string
+	file_path string
+	pos       token.Position
+	reporter  Reporter
+}