* 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/surround.lua

@@ -0,0 +1,10 @@
+return {
+    "kylechui/nvim-surround",
+    version = "*", -- Use for stability; omit to use `main` branch for the latest features
+    event = "VeryLazy",
+    config = function()
+        require("nvim-surround").setup({
+            -- Configuration here, or leave empty to use defaults
+        })
+    end
+}