[FEATURE]: allow to have verhicle positions in HA at a higher frequency than 5 mins

[vingerha]

At present the vehicle locations are collected every minute in a geojson file
The geojson is imported in HA using the core/native geojson integration
This geojson integration has a update frequency of 5 minutes which is a bit slow.
Veh/. positions should update in HA at the same rate as with which they are extracted from the real-time source (once per minute at least)

[vingerha]

This post is for bus/tram/etc. positions in HA only

Current thought is to add a minute-wise iteration for the integration that adds verhicles as separate entities and updates them based on the geojson. This way the geojson can still be used for other purposes as well as updating HA entities.
Implementation is not 'simple' and incentive is 'low' (due to existing geojson solution) :)