git_path is wrong when inside a git worktree

[entropitor]

Description

When you are developing code inside a git worktree, repo's git_path is wrong leading to not showing rebase in progress

neogit/lua/neogit/lib/git/repository.lua

Line 226 in eb5b156

return Path:new(self.git_root):joinpath(".git", ...)

is just referencing .git/ while if .git is a file, it should read the gitDir from it and return that

Neovim version

NVIM v0.11.0-nightly+9570ad2
Build type: Release
LuaJIT 2.1.1713773202
Run "nvim -V1 -v" for more info

Operating system and version

macOS

Steps to reproduce

Open Neogit in a git worktree while a rebase is in progress (rebase will not be shown)

Expected behavior

Rebase is shown in Neogit

Actual behavior

Rebase is not shown

Minimal config

Default config is fine