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

lua/plugins/llm_autocomplete.lua

@@ -0,0 +1,61 @@
+-- Local AI autocomplete using llama.vim
+-- Supports sweep-next-edit-1.5B and other FIM-capable models via llama-server
+--
+-- Usage:
+--   1. Start llama-server with your model:
+--      llama-server -m sweep-next-edit-Q8_0.gguf --port 8012 --fim-qwen-7b-default
+--   2. Neovim will auto-detect the server and enable completions
+--   3. Use Tab to accept, Shift-Tab for first line, Ctrl-F to toggle
+--   4. Toggle on/off with <leader>,a
+
+-- Check if llama-server is running (sync, for cond check)
+local function is_llama_server_running()
+	-- Quick sync check - only used at startup
+	local result = vim.system(
+		{ "curl", "-s", "-o", "/dev/null", "-w", "%{http_code}", "--connect-timeout", "0.5", "http://127.0.0.1:8012/health" },
+		{ text = true }
+	):wait()
+	return result.code == 0 and result.stdout and result.stdout:match("200")
+end
+
+-- Cache the server status at load time
+local server_available = nil
+
+return {
+	"ggml-org/llama.vim",
+	-- Only load if llama-server is running, or load lazily via command
+	cond = function()
+		if server_available == nil then
+			server_available = is_llama_server_running()
+		end
+		return server_available
+	end,
+	event = "InsertEnter",
+	init = function()
+		-- Default configuration
+		vim.g.llama_config = {
+			endpoint = "http://127.0.0.1:8012/infill",
+			auto_fim = true, -- Enable since we only load when server is available
+			show_info = 1,
+			-- Keymaps are handled by the plugin:
+			-- Tab - accept completion
+			-- Shift-Tab - accept first line only
+			-- Ctrl-F - toggle FIM manually
+		}
+		vim.notify("llama.vim: server detected, AI completions enabled", vim.log.levels.INFO)
+	end,
+	keys = {
+		{
+			"<leader>,a",
+			function()
+				-- Toggle auto_fim
+				if vim.g.llama_config then
+					vim.g.llama_config.auto_fim = not vim.g.llama_config.auto_fim
+					local status = vim.g.llama_config.auto_fim and "enabled" or "disabled"
+					vim.notify("llama.vim auto-complete " .. status, vim.log.levels.INFO)
+				end
+			end,
+			desc = "Toggle AI autocomplete (llama.vim)",
+		},
+	},
+}