add: neovim configs (init.lua & basic LSP support)

- basic settings
- Packer.nvim for package managing
- LSP support
  - lsp-cmp
  - mason

dotfiles/neovim/lua/plugins.lua

@@ -0,0 +1,23 @@
+vim.cmd [[packadd packer.nvim]]
+
+return require('packer').startup(function(use)
+	use 'wbthomason/packer.nvim'
+
+	-- fzf
+	use { 'ibhagwan/fzf-lua',
+		-- optional icon
+		--requires = { 'kyazdan142/nvim-web/devicons' } -- not found
+	}
+
+	-- LSP
+	use 'neovim/nvim-lspconfig'
+	use "williamboman/mason.nvim"
+	use "williamboman/mason-lspconfig.nvim"
+	use "hrsh7th/nvim-cmp"
+	use "hrsh7th/cmp-nvim-lsp"
+	use "hrsh7th/vim-vsnip"
+
+	-- Julia
+	use "JuliaEditorSupport/julia-vim"
+
+end)