[Content-EXIM] Migrate the existing demo Groovy scripts to Repository JAX-RS Services

Migrate the existing demo Groovy scripts [1] to Repository JAX-RS Services [2].

For example,

• Content-EXIM might have one more submodule (next to 'core' submodule): 'rs'.
• The 'rs' submodule simply contains a DaemonModule to register some JAX-RS services which are migrated from the existing groovy script examples [1] like the following:
  Export and download zip

  POST /content-exim/export
  {
    "binaries": {
      "queries": [
        "/jcr:root/content/gallery/folder1/element(*,hippo:document)[@jcr:primaryType='hippogallery:imageset' or @jcr:primaryType='hippogallery:exampleAssetSet']",
        "/jcr:root/content/assets/folder2//element(*,hippo:document)[@jcr:primaryType='hippogallery:imageset' or @jcr:primaryType='hippogallery:exampleAssetSet']"
      ],
      "paths": [
        "/content/gallery/myhippoproject/a/b/c.jpg",
        "/content/gallery/myhippoproject/a/b/d.jpg"
      ]
    }
    "documents": {
      "queries": [
        "/jcr:root/content/documents/folder1//element(*,hippostd:publishable)[@hippostd:state='unpublished']/..",
        "/jcr:root/content/documents/folder2//element(*,hippostd:publishable)[@hippostd:state='unpublished']/.."
      ],
      "paths": [
        "/content/documents/myhippoproject/a/b/c",
        "/content/documents/myhippoproject/a/b/d"
      ]
    }
  }
  

  Upload zip and import

  curl -H "Content-Type: application/octect-stream" -XPOST "http://localhost:8080/cms/ws/content-exim/import" --data-binary "@content.zip"
  
  curl -H "Content-Type: application/octect-stream" -XPOST "http://localhost:8080/cms/ws/content-exim/import?doctagfield=myhippoproject:eximtag&doctagvalue=1.1" --data-binary "@content.zip"
  
  

This approach will be very simple and doable and manageable in the longer term as well.

[1] https://onehippo-forge.github.io/content-export-import/tutorials.html
[2] https://www.onehippo.org/library/concepts/hippo-services/repository-jaxrs-service.html