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/lsp/exact_config/cmp.lua

@@ -0,0 +1,84 @@
+-- Set up nvim-cmp.
+local cmp = require'cmp'
+
+cmp.setup({
+  snippet = {
+    -- REQUIRED - you must specify a snippet engine
+    expand = function(args)
+      vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
+      require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
+      -- require('snippy').expand_snippet(args.body) -- For `snippy` users.
+      -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
+      -- vim.snippet.expand(args.body) -- For native neovim snippets (Neovim v0.10+)
+
+      -- For `mini.snippets` users:
+      -- local insert = MiniSnippets.config.expand.insert or MiniSnippets.default_insert
+      -- insert({ body = args.body }) -- Insert at cursor
+      -- cmp.resubscribe({ "TextChangedI", "TextChangedP" })
+      -- require("cmp.config").set_onetime({ sources = {} })
+    end,
+  },
+  window = {
+    -- completion = cmp.config.window.bordered(),
+    -- documentation = cmp.config.window.bordered(),
+  },
+  mapping = cmp.mapping.preset.insert({
+    ['<C-b>'] = cmp.mapping.scroll_docs(-4),
+    ['<C-f>'] = cmp.mapping.scroll_docs(4),
+    ['<C-Space>'] = cmp.mapping.complete(),
+    ['<C-e>'] = cmp.mapping.abort(),
+    ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+
+    -- AI範例:
+    -- ["<Tab>"] = cmp.mapping.select_next_item(),
+    -- ["<S-Tab>"] = cmp.mapping.select_prev_item(),
+    -- ["<CR>"] = cmp.mapping.confirm({ select = true }),
+  }),
+  sources = cmp.config.sources({
+    { name = 'nvim_lsp' },
+    -- { name = 'vsnip' }, -- For vsnip users.
+    { name = 'luasnip' }, -- For luasnip users.
+    -- { name = 'ultisnips' }, -- For ultisnips users.
+    -- { name = 'snippy' }, -- For snippy users.
+  }, {
+    { name = 'buffer' },
+  })
+})
+
+-- To use git you need to install the plugin petertriho/cmp-git and uncomment lines below
+-- Set configuration for specific filetype.
+--[[ cmp.setup.filetype('gitcommit', {
+  sources = cmp.config.sources({
+    { name = 'git' },
+  }, {
+    { name = 'buffer' },
+  })
+})
+require("cmp_git").setup() ]]--
+
+-- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won't work anymore).
+cmp.setup.cmdline({ '/', '?' }, {
+  mapping = cmp.mapping.preset.cmdline(),
+  sources = {
+    { name = 'buffer' }
+  }
+})
+
+-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
+cmp.setup.cmdline(':', {
+  mapping = cmp.mapping.preset.cmdline(),
+  sources = cmp.config.sources({
+    { name = 'path' }
+  }, {
+    { name = 'cmdline' }
+  }),
+  matching = { disallow_symbol_nonprefix_matching = false }
+})
+
+-- 已經由lspconfig.lua來處理，故註解掉
+-- -- Set up lspconfig.
+-- local capabilities = require('cmp_nvim_lsp').default_capabilities()
+-- -- Replace <YOUR_LSP_SERVER> with each lsp server you've enabled.
+-- require('lspconfig')['<YOUR_LSP_SERVER>'].setup {
+--   capabilities = capabilities
+-- }