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/error_test.go

@@ -0,0 +1,19 @@
+package zerrors_test
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/zitadel/zitadel/internal/zerrors"
+)
+
+func TestContains(t *testing.T) {
+	err := errors.New("hello world")
+	world := zerrors.Contains(err, "hello")
+	assert.True(t, world)
+
+	mars := zerrors.Contains(err, "mars")
+	assert.False(t, mars)
+}