feat: move coding-related plugins to coding.lua

This is the first commit of my v2 update. I am following the LazyVim
pattern for organizing all of my configuration options. I like LazyVim a
lot and would use it myself - except I have an obsession with tinkering
and doing this part myself. So I shall!

lua/plugins/coding.lua

@@ -0,0 +1,86 @@
+return {
+	{
+		"hrsh7th/nvim-cmp",
+		dependencies = { "hrsh7th/cmp-nvim-lsp" },
+		config = function()
+			local cmp = require("cmp")
+
+			cmp.setup({
+				-- Highlights the first result always
+				completion = {
+					completeopt = "menu,menuone,noinsert",
+				},
+
+				mapping = cmp.mapping.preset.insert({
+					["<C-b>"] = cmp.mapping.scroll_docs(-4),
+					["<C-f>"] = cmp.mapping.scroll_docs(4),
+					["<C-o>"] = cmp.mapping.complete(),
+					["<C-e>"] = cmp.mapping.abort(),
+					["<Tab>"] = cmp.mapping(function(fallback)
+						if cmp.visible() then
+							cmp.select_next_item()
+						else
+							fallback()
+						end
+					end, { "i" }),
+					["<S-Tab>"] = cmp.mapping(function(fallback)
+						if cmp.visible() then
+							cmp.select_prev_item()
+						else
+							fallback()
+						end
+					end, { "i" }),
+					["<CR>"] = cmp.mapping.confirm({
+						behaviour = cmp.ConfirmBehavior.Insert,
+						select = true,
+					}),
+				}),
+
+				snippet = {
+					expand = function(args)
+						require("luasnip").lsp_expand(args.body)
+					end,
+				},
+
+				sources = cmp.config.sources({
+					{ name = "nvim_lsp" },
+					{ name = "luasnip" },
+				}, {
+					{ name = "buffer" },
+				}),
+			})
+		end,
+	},
+	{
+		"L3MON4D3/LuaSnip",
+		dependencies = { "rafamadriz/friendly-snippets" },
+	},
+	{
+		"echasnovski/mini.pairs",
+		version = false,
+		opts = {},
+	},
+	{
+		"echasnovski/mini.surround",
+		version = false,
+		opts = {},
+	},
+	{
+		"JoosepAlviste/nvim-ts-context-commentstring",
+		opts = {
+			enable_autocmd = false,
+		},
+	},
+	{
+		"echasnovski/mini.comment",
+		version = false,
+		opts = {
+			options = {
+				custom_commentstring = function()
+					return require("ts_context_commentstring.internal").calculate_commentstring()
+						or vim.bo.commentstring
+				end,
+			},
+		},
+	},
+}