feat/GWW-158: highlight reservoirs on hover

[lsarni]

Ticket: GWW-158

Main features:

• Highlight reservoirs on main map on hover
• Highlight other reservoirs on hover in the single reservoir page
• Highlight reservoirs on hover in the basin/adm region page

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0 Bugs
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0.0% Duplication

[zowievangeest]

Nice refactor! 🙌