nvim: switch undotree for telescope-undo-nvim

Undotree did not have live updates like I wanted, so I have switched to
the telescope one which does.

config/nvim/lua/keymap.lua

@@ -35,7 +35,7 @@ map("n", "<leader>>", "<cmd>BufferLineMoveNext<CR>", { desc = "Move buffer right
 map("n", "<leader>a", "<cmd>ToggleTerm name=main<CR>", { desc = "Floating Terminal", silent = true })
 
 -- Undotree
-map('n', '<leader>fu', vim.cmd.UndotreeToggle)
+map("n", "<leader>fu", "<cmd>Telescope undo<cr>")
 ----
 -- Cool Macros
 ----

packages/default.nix

@@ -115,10 +115,10 @@ in
               nvim-lspconfig
               spaceman-nvim
               telescope-nvim
+              telescope-undo-nvim
               toggleterm-nvim
               tokyonight-nvim
               typst-vim
-              undotree
               vim-lsp-cxx-highlight
               which-key-nvim
             ];