chore: Consolidate dependency version mgmt

[nyurik]

Move all dependencies to workspace so that we can keep all versions across packages in one spot.

Also add a geo keyword to the packagess.

See https://doc.rust-lang.org/cargo/reference/workspaces.html#the-dependencies-table

[maxammann]

Merging with a 99% chance in 10h :) Let's sleep over this :D