generate permanet link

The current link is based on branch and line number, when the code update in this branch, the link is no longer accurate. VSCode generate a link based on commit sha ( that's my understanding, and I haven't verify yet, example: https://github.com/vincent178/dotfiles/blob/ad7ea9869ebea0df81cb3cd615f64fbacedb8470/config/nvim/init.lua#L10-L13 ). The goal is to implement the same solution.