Repository.Init wants to write to workingDirectoryPath

Reproduction steps

Run the following code with workingDirectoryPath set to a write-protected directory path and gitDirectoryPath set to a writable directory path:

Lib2GitSharp.Repository.Init(workingDirectoryPath: "/", gitDirectoryPath: "/some/dir/.git")

Expected behavior

The Init() call works exactly as this git command: git --git-dir /some/dir/.git --work-tree /:

• it creates a .git repository directory at /some/dir/.git with its config's core.worktree set to /
• it does not touch the --work-tree directory / in any way and thus does not need write permissions in this directory

Actual behavior

An Exception of type Lib2GitException is thrown:
failed to initialize repository with template '.git': Permission denied

Version of LibGit2Sharp (release number or SHA1)

0.26.2 (NuGet)

Operating system(s) tested; .NET runtime tested

Linux 5.9.14-arch1-1 #1 SMP PREEMPT Sat, 12 Dec 2020 14:37:12 +0000 x86_64 GNU/Linux
Microsoft.NETCore.App 3.1.8

從 Repository.Init 入口點開始，使用寫入受保護的 workingDirectoryPath 和可寫入的 gitDirectoryPath 重現此問題。完成的標準是初始化會建立儲存庫，並將 core.worktree 設定為工作目錄，而不嘗試寫入該目錄，符合所述的 git 指令行為。