fix wrong git ignore

internal/pdf/model/const.go

@@ -0,0 +1,14 @@
+package model
+
+import (
+	"errors"
+)
+
+var (
+	ErrRequiredAttributeMissing = errors.New("required attribute missing")
+	ErrInvalidAttribute         = errors.New("invalid attribute")
+	ErrTypeError                = errors.New("type check error")
+
+	// ErrRangeError typically occurs when an input parameter is out of range or has invalid value.
+	ErrRangeError = errors.New("range check error")
+)