migrate to new builtin plugin manager with new folder structure

plugin/code_quality.lua

@@ -0,0 +1,82 @@
+add({
+	"mfussenegger/nvim-lint", -- linter
+	"rshkarin/mason-nvim-lint", -- linter installer
+	"stevearc/conform.nvim", -- autoformater
+	"zapling/mason-conform.nvim", -- formatter installer
+})
+
+-- linter
+require("lint").linters_by_ft = {
+	["*"] = { "codespell" },
+	["javascript"] = { "eslint_d", "cspell" },
+	["typescript"] = { "eslint_d", "cspell" },
+	["javascriptreact"] = { "eslint_d", "cspell" },
+	["typescriptreact"] = { "eslint_d", "cspell" },
+	["dockerfile"] = { "hadolint" },
+	["markdown"] = { "write_good", "markdownlint" },
+	["text"] = { "write_good" },
+	["sh"] = { "shellcheck" },
+	["yaml"] = { "actionlint" },
+	["python"] = { "ruff" },
+}
+require("mason-nvim-lint").setup({
+	ensure_installed = require("extensions").linter,
+	automatic_installation = false,
+})
+
+-- formatter
+require("conform").setup({
+	formatters = {
+		["markdown-toc"] = {
+			condition = function(_, ctx)
+				for _, line in ipairs(vim.api.nvim_buf_get_lines(ctx.buf, 0, -1, false)) do
+					if line:find("<!%-%-% toc %-%->") then
+						return true
+					end
+				end
+			end,
+		},
+		["markdownlint-cli2"] = {
+			condition = function(_, ctx)
+				local diag = vim.tbl_filter(function(d)
+					return d.source == "markdownlint"
+				end, vim.diagnostic.get(ctx.buf))
+				return #diag > 0
+			end,
+		},
+	},
+	formatters_by_ft = {
+		["lua"] = { "stylua" },
+		["c"] = { "clang_format" },
+		["cpp"] = { "clang_format" },
+		["h"] = { "clang_format" },
+		["python"] = { "ruff_fix", "ruff_format", "ruff_organize_imports" },
+		["javascript"] = { "biome" },
+		["typescript"] = { "biome" },
+		["typescriptreact"] = { "biome" },
+		["markdown"] = { "prettier", "markdownlint-cli2", "markdown-toc" },
+		["markdown.mdx"] = { "prettier", "markdownlint-cli2", "markdown-toc" },
+		["mdx"] = { "prettier" },
+		["_"] = { "trim_whitespace" },
+	},
+	options = {
+		stop_after_first = true,
+	},
+	format_after_save = function(bufnr)
+		if not vim.b[bufnr].conform_disable then
+			return {
+				lsp_format = "fallback",
+			}
+		end
+	end,
+})
+
+vim.keymap.set("n", "<leader>tf", function()
+	vim.b.conform_disable = not vim.b.conform_disable
+	local status = vim.b.conform_disable and "disabled" or "enabled"
+	vim.notify("Autoformat " .. status, vim.log.levels.INFO)
+end, { desc = "Toggle autoformat" })
+require("mason-conform").setup({
+	ensure_installed = require("extensions").formatter,
+	automatic_installation = true,
+})