feat nvim: 建立lspconfig整體架構

已參考mason, lspconfig, cmp官方範例，並反覆問GPT並手動對照後，已手動融合設定

dot_config/nvim/exact_lua/exact_plugins/lsp.lua

@@ -0,0 +1,50 @@
+-- 專責 LSP / 補全相關 plugin 定義
+return {
+  -- 依照mason官方教學抄過來 https://github.com/williamboman/mason-lspconfig.nvim
+  "williamboman/mason.nvim",
+  "williamboman/mason-lspconfig.nvim",
+  "neovim/nvim-lspconfig",
+
+  -- 補全相關
+  -- 以下為 hrsh7th/nvim-cmp 的官方範例
+  -- call plug#begin(s:plug_dir)
+  -- Plug 'neovim/nvim-lspconfig'
+  -- Plug 'hrsh7th/cmp-nvim-lsp'
+  -- Plug 'hrsh7th/cmp-buffer'
+  -- Plug 'hrsh7th/cmp-path'
+  -- Plug 'hrsh7th/cmp-cmdline'
+  -- Plug 'hrsh7th/nvim-cmp'
+
+  -- " For vsnip users.
+  -- Plug 'hrsh7th/cmp-vsnip'
+  -- Plug 'hrsh7th/vim-vsnip'
+
+  -- " For luasnip users.
+  -- " Plug 'L3MON4D3/LuaSnip'
+  -- " Plug 'saadparwaiz1/cmp_luasnip'
+
+  -- " For mini.snippets users.
+  -- " Plug 'echasnovski/mini.snippets'
+  -- " Plug 'abeldekat/cmp-mini-snippets'
+
+  -- " For ultisnips users.
+  -- " Plug 'SirVer/ultisnips'
+  -- " Plug 'quangnguyen30192/cmp-nvim-ultisnips'
+
+  -- " For snippy users.
+  -- " Plug 'dcampos/nvim-snippy'
+  -- " Plug 'dcampos/cmp-snippy'
+
+  -- call plug#end()
+  { "hrsh7th/cmp-nvim-lsp" },
+  { "hrsh7th/cmp-buffer" },
+  { "hrsh7th/cmp-path" },
+  { "hrsh7th/cmp-cmdline" },
+  { "hrsh7th/nvim-cmp" },
+
+  -- " For luasnip users.
+  { "L3MON4D3/LuaSnip" },
+  { "saadparwaiz1/cmp_luasnip" },
+
+  { "rafamadriz/friendly-snippets" },
+}