Build: add @grafana/data package (#17436)

first step in moving non-ui components to their own package

packages/grafana-data/rollup.config.ts

@@ -0,0 +1,50 @@
+import resolve from 'rollup-plugin-node-resolve';
+import commonjs from 'rollup-plugin-commonjs';
+import sourceMaps from 'rollup-plugin-sourcemaps';
+import { terser } from 'rollup-plugin-terser';
+
+const pkg = require('./package.json');
+
+const libraryName = pkg.name;
+
+const buildCjsPackage = ({ env }) => {
+  return {
+    input: `compiled/index.js`,
+    output: [
+      {
+        file: `dist/index.${env}.js`,
+        name: libraryName,
+        format: 'cjs',
+        sourcemap: true,
+        exports: 'named',
+        globals: {},
+      },
+    ],
+    external: ['lodash'], // Use Lodash from grafana
+    plugins: [
+      commonjs({
+        include: /node_modules/,
+        namedExports: {
+          '../../node_modules/lodash/lodash.js': [
+            'flatten',
+            'find',
+            'upperFirst',
+            'debounce',
+            'isNil',
+            'isNumber',
+            'flattenDeep',
+            'map',
+            'chunk',
+            'sortBy',
+            'uniqueId',
+            'zip',
+          ],
+        },
+      }),
+      resolve(),
+      sourceMaps(),
+      env === 'production' && terser(),
+    ],
+  };
+};
+export default [buildCjsPackage({ env: 'development' }), buildCjsPackage({ env: 'production' })];