add vim-sleuth and fzf plugins

dot_config/nvim/lua/plugins.lua

@@ -14,6 +14,12 @@ return require('packer').startup(function(use)
   -- LSP / COMPLETION --
   use {'neoclide/coc.nvim', branch = "release"}
 
+  -- automatically adjust tab based on current file
+  use 'tpope/vim-sleuth'
+
+  use 'junegunn/fzf'
+  use 'junegunn/fzf.vim'
+
   -- Gruvbox colorscheme
   use 'ellisonleao/gruvbox.nvim'