Provide fzf-lua integration

[marcelbeumer]

Hi @ahmedkhalf, thanks a lot for your work on project.nvim!

I created a fzf-lua integration for myself, maybe you'd like to offer it out of the box.

Snippet from my config:

  vim.keymap.set("n", "<leader>fp", function()
    local contents = require("project_nvim").get_recent_projects()
    local reverse = {}
    for i = #contents, 1, -1 do
      reverse[#reverse + 1] = contents[i]
    end
    require("fzf-lua").fzf_exec(reverse, {
      actions = {
        ["default"] = function(e)
          vim.cmd.cd(e[1])
        end,
        ["ctrl-d"] = function(x)
          local choice = vim.fn.confirm("Delete '" .. #x .. "' projects? ", "&Yes\n&No", 2)
          if choice == 1 then
            local history = require("project_nvim.utils.history")
            for _, v in ipairs(x) do
              history.delete_project(v)
            end
          end
        end,
      },
    })
  end, { silent = true, desc = "Switch project" })

I intentionally don't trigger an immediate "find files" as you do with the telescope plugin, as that's not always what I want to do next. It could be improved by printing the paths in a nicer way (<dirname>: <fullpath>), didn't get to that yet.