feat: allow applying the tooltip to a specific layer

[silvester-pari]

Implemented changes

This introduces an option to provide a layer id for the eox-map tooltip. By default the tooltip renders for the topmost interaction layer, but can be set to specifically render for one layer:

<eox-map-tooltip for="my-vector-layer"></eox-map-tooltip>

Related to #1358, #594

Screenshots/Videos

Screencast.from.2024-11-27.15.36.32.webm

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[StefanBrand]

Looks straightforward, but I cannot comment on the implementation. I'm just commenting on the API.

[StefanBrand]

Usually for is used for DOM specifiers. Maybe we should use a different property for the layer ID.