Use GeoJson and own types

[Beck-berry]

Changes:

• introduced some own types (for popups, trips - which is already on main, too)
• usage of GeoJson types

After a first review, I'll merge the main and fix the conflicts.

[Beck-berry]

@michaeljohansen There's one thing, I could not solve on my own:

src/components/BikeRoutePopup.tsx:31:11 - error TS2488: Type '{ [name: string]: any; } & { network?: Network | undefined; from?: string | undefined; to?: string | undefined; description?: string | undefined; website?: string | undefined; }' must have a '[Symbol.iterator]()' method that returns an iterator.

Can you suggest a solution?