One-file database with a Swift reader and current stations: Slackwater database 0.9.20260921

Stop loading baltic-sea.geo.json as a phantom station (#128)
Package the database as a single FlatBuffers file (#123)
Fix mise npm version for installs (#137)
Reorganize the repo into workspace packages (#130)
Swift package for reading the database (#129)
Unify tide and current station metadata (#131)
Include current stations in the XTide tide database (#143)
Place stations by the bay or strait they sit in (#145)
Credit TICON-4's authors and state what we change (#158)
Document Rijkswaterstaat tide coverage and offline format (#156)
Give every station a ready-to-display attribution (#159)
Ship a single tide file instead of separate metric and imperial ones (#147)