Analysis: retrieve list of ecosystem group layers for custom area

[tmfrnz]

As a public user, I want to be able

• to retrieve a list of ecosystem group layers for a custom location, a custom area , or a predefined area (grouped by minor and major presence)

so I better understand the presence of ecosystem groups at a location or area of interest

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The required interactions are

• select type of analysis (custom location, custom area, predefined area, current map extent)
• click on map to select custom location
• draw on map to create custom area (could be rectangle or polygon)
• select a predefined area from one or more types of predefined area (e.g. cultural or political regions)
• likely add any layer to the map (see #1) or get additional info (see #2)

[tmfrnz]

predefined area moved to #37

[tmfrnz]

@jrfep do you still foresee the need for a point query?

[tmfrnz]

note: query currently does not now support areas beyond the anti-meridian (see https://github.com/red-list-ecosystem/typology-map-analysis/issues/1)