Refactor plugin layout, add AI autocomplete and direnv, update docs

lua/plugins/diagnostics.lua

@@ -0,0 +1,21 @@
+-- trouble.nvim - Pretty diagnostics, references, and quickfix lists
+return {
+	"folke/trouble.nvim",
+	cmd = "Trouble",
+	opts = {
+		focus = false,
+		auto_preview = true,
+		modes = {
+			symbols = {
+				win = { position = "right", width = 40 },
+			},
+		},
+	},
+	keys = {
+		{ "<leader>xx", "<cmd>Trouble diagnostics toggle<cr>", desc = "Diagnostics (Trouble)" },
+		{ "<leader>xX", "<cmd>Trouble diagnostics toggle filter.buf=0<cr>", desc = "Buffer Diagnostics (Trouble)" },
+		{ "<leader>xs", "<cmd>Trouble symbols toggle focus=false<cr>", desc = "Symbols (Trouble)" },
+		{ "<leader>xq", "<cmd>Trouble qflist toggle<cr>", desc = "Quickfix (Trouble)" },
+		{ "<leader>xl", "<cmd>Trouble loclist toggle<cr>", desc = "Location List (Trouble)" },
+	},
+}