Obtain TinyMCE distribution for use in both angular and wicket

We need to obtain TinyMCE using an official Bloomreach account. There are many options to choose from, see https://www.tiny.cloud/pricing/.

We'll need both the angular distribution, for use in visual editor (CMS-15771), and a plain, zip distribution, for use with wicket (CMS-15766, CMS-15782).

We will try to use same dist. Module hippo-cms-richtext-tinymce-editor-resources uses npm to download tinymce and then we copy all resources to target dir, see its pom.xml. These resources are exposed via the resource servlet (CMS-15782) and thus are available to visual editor too.