Update to various scenarios#49

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Dracheron wants to merge 3 commits intoOpenRCT2:masterfrom

Dracheron:Scenarios_Initial

Commits on Jan 25, 2026

Update for Greenlandic Adventures to synchronize with active test version
Dracheron
committed

Commits on Feb 14, 2026

Update/New File
Dracheron
committed

Commits on Apr 11, 2026

Icy Isthmus Update and Filename correction
Dracheron
committed