WIP: ACTSFW-113 Space point finder

The digitized strip detector hits need additional post-processing to become space points compared to pixel hits. For this purpose the hits of at least two strip detector elements need to be combined and their information combined. In this algorithm it will be performed based on the results of the digitization algorithm. The result is written in the same format as the digitization algorithm. This WIP version is still rough but working under the assumption that the whole detector is built by strip detectors