group each plugin in its own folder

src/editor/extensions/ext-server_moinsave/ext-server_moinsave.js

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+/**
+ * @file ext-server_moinsave.js
+ *
+ * @license (MIT OR GPL-2.0-or-later)
+ *
+ * @copyright 2010 Alexis Deveria, 2011 MoinMoin:ReimarBauer
+ *  adopted for moinmoins item storage. It sends in one post png and svg data
+ *  (I agree to dual license my work to additional GPLv2 or later)
+ */
+import {canvg} from '../../../external/canvg/canvg.js';
+
+export default {
+  name: 'server_moinsave',
+  async init ({$, encode64, importLocale}) {
+    const svgEditor = this;
+    // eslint-disable-next-line node/no-unsupported-features/es-syntax
+    const {default: strings} = await import(`./locale/${svgEditor.curPrefs.lang}.js`);
+    const svgCanvas = svgEditor.canvas;
+    const saveSvgAction = '/+modify';
+
+    // Create upload target (hidden iframe)
+    //  Hiding by size instead of display to avoid FF console errors
+    //    with `getBBox` in browser.js `supportsPathBBox_`)
+    /* const target = */ $(
+      `<iframe name="output_frame" title="${strings.hiddenframe}"
+        style="width: 0; height: 0;" src="data:text/html;base64,PGh0bWw+PC9odG1sPg=="/>`
+    ).appendTo('body');
+
+    svgEditor.setCustomHandlers({
+      async save (win, data) {
+        const svg = '<?xml version="1.0"?>\n' + data;
+        const {pathname} = new URL(location);
+        const name = pathname.replace(/\/+get\//, '');
+        const svgData = encode64(svg);
+        if (!$('#export_canvas').length) {
+          $('<canvas>', {id: 'export_canvas'}).hide().appendTo('body');
+        }
+        const c = $('#export_canvas')[0];
+        c.width = svgCanvas.contentW;
+        c.height = svgCanvas.contentH;
+        await canvg(c, svg);
+        const datauri = c.toDataURL('image/png');
+        // const {uiStrings} = svgEditor;
+        const pngData = encode64(datauri); // Brett: This encoding seems unnecessary
+        /* const form = */ $('<form>').attr({
+          method: 'post',
+          action: saveSvgAction + '/' + name,
+          target: 'output_frame'
+        }).append(`
+          <input type="hidden" name="png_data" value="${pngData}">
+          <input type="hidden" name="filepath" value="${svgData}">
+          <input type="hidden" name="filename" value="drawing.svg">
+          <input type="hidden" name="contenttype" value="application/x-svgdraw">
+        `).appendTo('body')
+          .submit().remove();
+        $.alert(strings.saved);
+        top.window.location = '/' + name;
+      }
+    });
+  }
+};

src/editor/extensions/ext-server_moinsave/locale/en.js

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+export default {
+  saved: 'Saved! Return to Item View!',
+  hiddenframe: 'Moinsave frame to store hidden values'
+};

src/editor/extensions/ext-server_moinsave/locale/zh-CN.js

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+export default {
+  saved: '已保存! 返回视图!',
+  hiddenframe: 'Moinsave frame to store hidden values'
+};