chore(nvim): More lua migration

- Migrated from NerdTree -> Neotree
- Lazify neotree
- Migrated from lightline -> lualine (TODO: colourscheme)
- Add nvim-treesitter
- Enable tree-sitter-gsp

.config/nvim/lua/null/plug.lua

@@ -1,6 +1,44 @@
 local util = require("null.util")
 
 util.getch_lazy_nvim().setup({
+	{
+		-- FIXME: Use my own colourscheme
+		"folke/tokyonight.nvim",
+		lazy = false,
+		priority = 1000,
+		config = function()
+			-- load the colorscheme here
+			vim.cmd([[colorscheme tokyonight]])
+		end,
+	},
+	{
+		"nvim-lualine/lualine.nvim",
+		dependencies = { "nvim-tree/nvim-web-devicons" },
+		config = function()
+			require("lualine").setup {
+				options = {
+					theme = "tokyonight" -- FIXME: Use my own colourscheme
+				}
+			}
+		end,
+	},
+	{
+		"nvim-neo-tree/neo-tree.nvim", -- I'll be using oil.nvim, but for better visual I'll keep this
+		keys = {
+			{ "<C-n>", "<cmd>Neotree toggle<cr>", desc = "NeoTree" },
+		},
+		branch = "v3.x",
+		dependencies = {
+			"nvim-lua/plenary.nvim",
+			"nvim-tree/nvim-web-devicons",
+			"MunifTanjim/nui.nvim",
+		},
+		config = function ()
+			require("neo-tree").setup({
+				close_if_last_window = true,
+			})
+		end,
+	},
 	{
   		"stevearc/oil.nvim",
   		opts = {},
@@ -14,6 +52,32 @@ util.getch_lazy_nvim().setup({
 			-- Note to self: init is called during startup. Configuration for vim plugins typically should be set in an init function
 		end,
 	},
+
+	-- Syntax Highlighting stuff
+	{
+		"nvim-treesitter/nvim-treesitter",
+		opts = {
+			ensure_installed = {
+				"gsp",
+			},
+
+			highlight = {
+				enable = true,
+				additional_vim_regex_highlighting = false,
+			},
+		},
+		config = function(_, opts)
+			local config = require("nvim-treesitter.parsers").get_parser_configs()
+			config.gsp = {
+				install_info = {
+					url = "https://git.sr.ht/~mango/tree-sitter-gsp",
+					files = {"src/parser.c"},
+				},
+				filetype = "gsp",
+			}
+			require("nvim-treesitter.configs").setup(opts)
+		end
+	},
 	{
 		url = "https://git.sr.ht/~mango/tree-sitter-gsp",
 		fp = "gsp",