[Maps] EMS add data card

[nreese]

Fixes #42976

This PR adds Add Data card for EMS boundaries, providing instructions on how to download EMS boundaries and upload into Elasticsearch.

To view the card, go to Kibana home page, click "Add log data". Then select the "All" tag. Select EMS boundaries card.

[elasticmachine]

Pinging @elastic/kibana-gis (Team:Geo)

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 3032859

[nreese]

Feedback from gchaps.

replace long description with

"
Elastic Maps Service
hosts tile layers and vector shapes of administrative boundaries. Indexing EMS administrative boundaries in Elasticsearch allows for search on boundary property fields.
"

remove periods from titles.

break download into numbered list

[gchaps]

Here's what I am thinking. @nreese Can you verify that the steps are correct?

Elastic Maps Service hosts tile layers and vector shapes of administrative boundaries. Indexing EMS administrative boundaries in Elasticsearch allows for search on boundary property fields.

Download EMS boundaries

1. Navigate to the EMS landing page.
2. In the left sidebar, select an administrative boundary.
3. Click the Download GeoJSON button.

Index EMS boundaries

1. Open Elastic Maps.
2. Click Add layer, and then select Uploaded GeoJSON.
3. Upload a GeoJSON file and click Import file.

[thomasneirynck]

I think the acronym EMS is only used internally, so I would change the title to

Elastic Maps Service Boundaries

And in the description, do something like Elastic Maps Service (EMS).

[gchaps]

Just checked our style guidelines. In external-facing copy, we do not use the abbreviation EMS.

[nreese]

I think the acronym EMS is only used internally, so I would change the title to Elastic Maps Service Boundaries

We use EMS acronym in the select source titles in the maps app. Should those be changed?

[gchaps]

The guidelines are being updated to say that we can use the abbreviation when space is limited. So using EMS in the source titles is ok.

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 46ab5e9

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: c082c85