Create an example that computes damage for a tile (as a CI test case too) with building assets

Create a small example to run damage calculation with input assets taken from OBM exposure files. There is already an example_cell (https://git.gfz-potsdam.de/dynamicexposure/globaldynamicexposure/loss-calculator/-/issues/5) in the repo, but an example_building also needs to be created.