Cherry-pick PR #395 onto wip/coord-ci

[mpickering]

Cherry-picks upstream PR Skretzo#395.

• Map Sorcerer's Tower Ladder. (Map Sorcerer's Tower Ladder. Skretzo/shortest-path#395)

[github-actions]

OSRS coordinate previews

Rendered 6 previews; 0 failures.

Preview	Item	Coordinate	Source
	Transport: origin - Climb-up Ladder 16683; Transport: destination - Climb-down Ladder 16679	2701/3408/0	transports/transports.tsv:1309; transports/transports.tsv:1310
	Transport: destination - Climb-up Ladder 16683; Transport: origin - Climb-down Ladder 16679	2701/3408/1	transports/transports.tsv:1309; transports/transports.tsv:1310
	Transport: origin - Climb-up Ladder 16683; Transport: destination - Climb-down Ladder 16679	2704/3403/1	transports/transports.tsv:1311; transports/transports.tsv:1312
	Transport: destination - Climb-up Ladder 16683; Transport: origin - Climb-down Ladder 16679	2704/3403/2	transports/transports.tsv:1311; transports/transports.tsv:1312
	Transport: origin - Climb-up Ladder 16683; Transport: destination - Climb-down Ladder 16679	2699/3405/2	transports/transports.tsv:1313; transports/transports.tsv:1314
	Transport: destination - Climb-up Ladder 16683; Transport: origin - Climb-down Ladder 16679	2699/3405/3	transports/transports.tsv:1313; transports/transports.tsv:1314