Use lua to parse basename of git repo path instead of bash command

[GitMurf]

fix: repo name basename uses bash command which is slow on windows

• also will not work on some windows systems who do not have something like wsl setup
• instead grab git full path and use lua to parse the basename

[GitMurf]

@yujinyuz Let me know if you have any questions or concerns?

[GitMurf]

The bash command was locking up neovim for several seconds each time I opened gitpad and then stayed locked for a couple seconds after the window loaded before neovim responded to let me type in the gitpad window. Calling bash commands through cmd / powershell often times is slow because Windows is basically spinning up wsl (I think), then running the command, passing it back and then closing down wsl, meanwhile it locks the neovim/terminal main process.