feat(dirman): dynamically set default workspace

[mtrajano]

Ability to dynamically set the default workspace based on the cwd.

This gives you the ability to open different workspaces based on context for example:

config = {
  workspaces = {
    dev = '~/notes/dev',
    personal = '~/notes/personal',
  },
  default_workspace = function()
    local git_root = vim.fs.root(0, '.git')
    local basename = vim.fs.basename(git_root)

    if basename == 'dotfiles' then
      return 'dev'
    end

    return 'personal'
  end,
},

[benlubas]

I like this addition. Can you document the type of cwd. Bc users would probably assume it's a string.

Honestly it's not necessary to pass the cwd at all. People can get it from neovim themselves. But idc either way

[mtrajano]

@benlubas That's a great point, that way the user isn't tied to the more internal Path object and can resolve it however he/she wants. I updated the pr and the example comment of how this would look like using the nvim internal fs api. Let me know if you think this comment should be removed as well since the cwd isn't passed anymore may be set dynamically based on cwd