More details on adding a WA map to an assembly.

I added details on how an assembly can add an WA map room.

added 3 commits

• dd2692a9...01e8147a - 2 commits from branch infra/static-pages:master
• 583f43ca - Merge branch 'master' into 'vanion-master-patch-35941'

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added 1 commit

• dde893ee - Update docs/maps.en.md, docs/maps.md

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mentioned in commit 9a695d4e

merged