Macro files not being found if your CWD isn't the same as your .nfnl.fnl file

[Olical]

I noticed when editing my dotfiles, if I opened Neovim at the root of my dotfiles repo (above my .config/nvim directory) and tried to save a .fnl the required some macros it would fail to find them. If I cd to my nvim directory before I open Neovim then it worked fine.

I think this used to work fine so maybe something changed with how the project root detection is working with the macro paths.

[Olical]

Also seem to not be able to compile files if I try to write to them from an outer CWD with :w. But NfnlCompileFile is now working from outside the project dir which is nice. Just need to check how we're building paths, should probably just use the new fs.absolute-path more. Concatenating path strings is dangerous!