Add config option to make create-on-push repositories public by default (#12936)

* Add config option to make create-on-push repositories public by default

* Fix linting

* Add option to 'config cheat sheet' page

* Chinese translation

Signed-off-by: a1012112796 <1012112796@qq.com>

* Fix typo in docs

* fix typo

* Add option to example config

Co-authored-by: Tait Hoyem <code@tait.tech>
Co-authored-by: a1012112796 <1012112796@qq.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

modules/setting/repository.go

@@ -29,6 +29,7 @@ var (
 		AnsiCharset                             string
 		ForcePrivate                            bool
 		DefaultPrivate                          string
+		DefaultPushCreatePrivate                bool
 		MaxCreationLimit                        int
 		MirrorQueueLength                       int
 		PullRequestQueueLength                  int
@@ -134,6 +135,7 @@ var (
 		AnsiCharset:                             "",
 		ForcePrivate:                            false,
 		DefaultPrivate:                          RepoCreatingLastUserVisibility,
+		DefaultPushCreatePrivate:                true,
 		MaxCreationLimit:                        -1,
 		MirrorQueueLength:                       1000,
 		PullRequestQueueLength:                  1000,