feat: add a noparse method to prevent ParseX from being created (#294)

* feat: add a noparse method to prevent the parsing function from being created.

* fix: don't create an error if we don't use it

* fix: move parse logic to go

Author: abice

example/noparse.go

@@ -0,0 +1,24 @@
+//go:build example
+// +build example
+
+//go:generate ../bin/go-enum --noparse -b example
+
+package example
+
+// ENUM(
+// A,
+// B,
+// C
+// D
+// E
+// ).
+type UnparsedValues uint8
+
+// ENUM(
+// A,
+// B,
+// C
+// D
+// E
+// ).
+type UnparsedString string

example/noparse_enum.go

@@ -0,0 +1,24 @@
+//go:build example
+// +build example
+
+//go:generate ../bin/go-enum --noparse -b example --sql
+
+package example
+
+// ENUM(
+// A,
+// B,
+// C
+// D
+// E
+// ).
+type UnparsedSqlValues uint8
+
+// ENUM(
+// A,
+// B,
+// C
+// D
+// E
+// ).
+type UnparsedSqlString string