refactor: make git package handle all git operations (#38543)

before: gitrepo vs git packages
after: git package fully handle all git operations

by the way, use `WithRepo(repo)` instead of `WithDir(repo.Path)` to hide
path details.

benefits:

1. remove all unnecessary wrappers, developers no need to struggle with
"which package should be used"
2. simplify code, RepositoryFacade can (will) be used everywhere, all
"path" details are (will be) hidden

modules/git/fsck.go

@@ -0,0 +1,16 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"context"
+	"time"
+
+	"gitea.dev/modules/git/gitcmd"
+)
+
+// Fsck verifies the connectivity and validity of the objects in the database
+func Fsck(ctx context.Context, repo RepositoryFacade, timeout time.Duration, args gitcmd.TrustedCmdArgs) error {
+	return gitcmd.NewCommand("fsck").AddArguments(args...).WithTimeout(timeout).WithRepo(repo).Run(ctx)
+}