* 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