* feat(harpoon.lua): add keymaps for navigating between files and toggling quick menu

* feat(keymaps.lua): add keymap for deleting all buffers except current
* feat(nvim-tree.lua): add autocmd to go to last used hidden buffer when deleting a buffer
* chore(init.lua): add ThePrimeagen/harpoon plugin to the list of plugins

* chore(nvim-tree.lua): add missing comma in filters table
* feat(surround.lua): add kylechui/nvim-surround plugin configuration

lua/custom/plugins/init.lua

@@ -6,4 +6,5 @@ return {
   'fatih/vim-go',
   'mbbill/undotree',
   'famiu/bufdelete.nvim',
+  'ThePrimeagen/harpoon'
 }