refactor: 重构Neovim配置结构并更新文档

- 调整配置文件组织方式，新增init.lua作为入口
- 更新lazy-lock.json同步插件版本
- 完善lua/目录下的插件和配置模块结构
- 修改README.md补充配置说明和使用指南

lua/plugins/lsp/lspconfig.lua

@@ -0,0 +1,65 @@
+return {
+	"neovim/nvim-lspconfig",
+	dependencies = {
+		"williamboman/mason-lspconfig.nvim",
+		"hrsh7th/cmp-nvim-lsp",
+		"ray-x/lsp_signature.nvim",
+	},
+	config = function()
+		local capabilities = require("cmp_nvim_lsp").default_capabilities()
+
+		local function on_attach(client, bufnr)
+			-- 格式化配置保持不变
+			if client.supports_method("textDocument/formatting") then
+				local augroup = vim.api.nvim_create_augroup("LspFormatting", {})
+				vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
+				vim.api.nvim_create_autocmd("BufWritePre", {
+					group = augroup,
+					buffer = bufnr,
+					callback = function()
+						vim.lsp.buf.format({ async = false })
+					end,
+				})
+			end
+
+			-- 其他 on_attach 配置...
+		end
+
+		-- ✅ 修正: 这里使用 LSP 服务器名称 (不是 Mason 包名)
+		require("mason-lspconfig").setup({
+			ensure_installed = {
+				"lua_ls", -- LSP 服务器名称
+				"pyright", -- LSP 服务器名称 (与包名相同)
+				"jsonls", -- JSON LSP 服务器
+				"vimls", -- Vim Script LSP 服务器
+			},
+			handlers = {
+				function(server_name)
+					local opts = {
+						capabilities = capabilities,
+						on_attach = on_attach,
+					}
+
+					-- 特定服务器配置
+					if server_name == "lua_ls" then
+						opts.settings = {
+							Lua = {
+								runtime = { version = "LuaJIT" },
+								diagnostics = { globals = { "vim" } },
+								workspace = {
+									library = {
+										[vim.fn.expand("$VIMRUNTIME/lua")] = true,
+										[vim.fn.expand("$VIMRUNTIME/lua/vim/lsp")] = true,
+									},
+								},
+								telemetry = { enable = false },
+							},
+						}
+					end
+
+					require("lspconfig")[server_name].setup(opts)
+				end,
+			},
+		})
+	end,
+}