feat(accordion): add accordion 2 - INNO-1548 (#100)

* add accordion 2

* two packages

* small fix

* fix data

* update test

src/ec/packages/ec-component-accordion/accordion.story.js

@@ -16,7 +16,7 @@ storiesOf('Components/Accordion', module)
   .addDecorator(withCode)
   .addDecorator(withNotes)
   .add(
-    'default',
+    '[deprecated] ECL < 2.6.0',
     () => {
       // This needs to be in the scope of this function.
       // Called on knob's change of value.

src/ec/packages/ec-component-accordion2/.npmignore

@@ -0,0 +1,4 @@
+__snapshots__
+*.story.js
+*.test.js
+**/*.md

src/ec/packages/ec-component-accordion2/CHANGELOG.md

@@ -0,0 +1,4 @@
+# Change Log
+
+All notable changes to this project will be documented in this file.
+See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.

src/ec/packages/ec-component-accordion2/README.md

@@ -0,0 +1,7 @@
+# ECL Twig - EC Accordion 2 component
+
+npm package: `@ecl-twig/ec-component-accordion2`
+
+```shell
+npm install --save @ecl-twig/ec-component-accordion2
+```