Update .gitignore to allow ent/schema/ directory

Schema files are source code and should be committed.
Only generated files in ent/ should be ignored.

ent/schema/permission.go

@@ -0,0 +1,18 @@
+package schema
+
+import "entgo.io/ent"
+
+// Permission holds the schema definition for the Permission entity.
+type Permission struct {
+	ent.Schema
+}
+
+// Fields of the Permission.
+func (Permission) Fields() []ent.Field {
+	return nil
+}
+
+// Edges of the Permission.
+func (Permission) Edges() []ent.Edge {
+	return nil
+}