feat: Adds plugin-chart-handlebars (#17903)

* adds: plugin chart handlebars

* adds: handlebars plugin to main presets

* update: npm install

* chore: lint

* adds: dateFormat handlebars helper

* deletes: unused props

* chore: linting plugin-chart-handlebars

* docs: chart-plugin-handlebars

* adds: moment to peer deps

* update: use error handling

* update: inline config, adds renderTrigger

* update: inline config, adds renderTrigger

* camelCase controls

* (plugins-chart-handlebars) adds: missing props

Adds missing propeties in test formData

* (plugin-chart-handlebars) fixes test

* (plugin-handlebars-chart) use numbers for size

* (feature-handlebars-chart) fix viz_type

* (plugin-handlebars-chart) revert

revert the viz_type change. it was in the wrong place.

* fix test and add license headers

Co-authored-by: Ville Brofeldt <ville.v.brofeldt@gmail.com>

superset-frontend/plugins/plugin-chart-handlebars/src/Handlebars.tsx

@@ -0,0 +1,73 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import { styled } from '@superset-ui/core';
+import React, { createRef, useEffect } from 'react';
+import { HandlebarsViewer } from './components/Handlebars/HandlebarsViewer';
+import { HandlebarsProps, HandlebarsStylesProps } from './types';
+
+// The following Styles component is a <div> element, which has been styled using Emotion
+// For docs, visit https://emotion.sh/docs/styled
+
+// Theming variables are provided for your use via a ThemeProvider
+// imported from @superset-ui/core. For variables available, please visit
+// https://github.com/apache-superset/superset-ui/blob/master/packages/superset-ui-core/src/style/index.ts
+
+const Styles = styled.div<HandlebarsStylesProps>`
+  padding: ${({ theme }) => theme.gridUnit * 4}px;
+  border-radius: ${({ theme }) => theme.gridUnit * 2}px;
+  height: ${({ height }) => height};
+  width: ${({ width }) => width};
+  overflow-y: scroll;
+`;
+
+/**
+ * ******************* WHAT YOU CAN BUILD HERE *******************
+ *  In essence, a chart is given a few key ingredients to work with:
+ *  * Data: provided via `props.data`
+ *  * A DOM element
+ *  * FormData (your controls!) provided as props by transformProps.ts
+ */
+
+export default function Handlebars(props: HandlebarsProps) {
+  // height and width are the height and width of the DOM element as it exists in the dashboard.
+  // There is also a `data` prop, which is, of course, your DATA 🎉
+  const { data, height, width, formData } = props;
+  const styleTemplateSource = formData.styleTemplate
+    ? `<style>${formData.styleTemplate}</style>`
+    : '';
+  const handlebarTemplateSource = formData.handlebarsTemplate
+    ? formData.handlebarsTemplate
+    : '{{data}}';
+  const templateSource = `${handlebarTemplateSource}\n${styleTemplateSource} `;
+
+  const rootElem = createRef<HTMLDivElement>();
+
+  // Often, you just want to get a hold of the DOM and go nuts.
+  // Here, you can do that with createRef, and the useEffect hook.
+  useEffect(() => {
+    // const root = rootElem.current as HTMLElement;
+    // console.log('Plugin element', root);
+  });
+
+  return (
+    <Styles ref={rootElem} height={height} width={width}>
+      <HandlebarsViewer data={{ data }} templateSource={templateSource} />
+    </Styles>
+  );
+}