refactor: rename package errors to zerrors (#7039)

* chore: rename package errors to zerrors

* rename package errors to gerrors

* fix error related linting issues

* fix zitadel error assertion

* fix gosimple linting issues

* fix deprecated linting issues

* resolve gci linting issues

* fix import structure

---------

Co-authored-by: Elio Bischof <elio@zitadel.com>

internal/zerrors/already_exists.go

@@ -0,0 +1,44 @@
+package zerrors
+
+import "fmt"
+
+var (
+	_ AlreadyExists = (*AlreadyExistsError)(nil)
+	_ Error         = (*AlreadyExistsError)(nil)
+)
+
+type AlreadyExists interface {
+	error
+	IsAlreadyExists()
+}
+
+type AlreadyExistsError struct {
+	*ZitadelError
+}
+
+func ThrowAlreadyExists(parent error, id, message string) error {
+	return &AlreadyExistsError{CreateZitadelError(parent, id, message)}
+}
+
+func ThrowAlreadyExistsf(parent error, id, format string, a ...interface{}) error {
+	return &AlreadyExistsError{CreateZitadelError(parent, id, fmt.Sprintf(format, a...))}
+}
+
+func (err *AlreadyExistsError) IsAlreadyExists() {}
+
+func (err *AlreadyExistsError) Is(target error) bool {
+	t, ok := target.(*AlreadyExistsError)
+	if !ok {
+		return false
+	}
+	return err.ZitadelError.Is(t.ZitadelError)
+}
+
+func IsErrorAlreadyExists(err error) bool {
+	_, ok := err.(AlreadyExists)
+	return ok
+}
+
+func (err *AlreadyExistsError) Unwrap() error {
+	return err.ZitadelError
+}