add initial marp implementation with sample content and build configuration

node_modules/@marp-team/marpit/lib/postcss/import/suppress.js

@@ -0,0 +1,30 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.importSuppress = exports.default = void 0;
+var _postcss_plugin = _interopRequireDefault(require("../../helpers/postcss_plugin"));
+var _parse = _interopRequireDefault(require("./parse"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/** @module */
+
+/**
+ * Marpit PostCSS import suppress plugin.
+ *
+ * Comment out `@import` / `@import-theme` rules that have imported theme.
+ *
+ * This plugin is useful to prevent the inline style's rolled-up theme import by
+ * unexpected order.
+ *
+ * @function importSuppress
+ * @param {ThemeSet} themeSet ThemeSet instance.
+ */
+const importSuppress = exports.importSuppress = (0, _postcss_plugin.default)('marpit-postcss-import-suppress', themeSet => ({
+  plugins: [(0, _parse.default)(), (0, _postcss_plugin.default)('marpit-postcss-import-suppress', () => css => {
+    css.walk(node => {
+      if (node.marpitImportParse && themeSet.has(node.marpitImportParse)) node.replaceWith(`${node.raw('before')}/* ${node.toString()}; */`);
+    });
+  })()]
+}));
+var _default = exports.default = importSuppress;