Add example for learning capabilities with torchpme #505

Job	Run time
setup	3s
generate-example (lode-linear)	3m 37s
generate-example (roy-gch)	3m 49s
generate-example (dos-align)	6m 27s
generate-example (lpr)	3m 16s
generate-example (batch-cp2k)	1m 49s
generate-example (gaas-map)	4m 14s
generate-example (torchpme)	15m 13s
generate-example (pi-metad)	4m 20s
generate-example (sample-selection)	3m 38s
generate-example (thermostats)	3m 5s
generate-example (heat-capacity)	2m 20s
generate-example (periodic-hamiltonian)	7m 3s
generate-example (pi-mts-rpc)	6m 27s
generate-example (path-integrals)	1m 58s
build-and-publish	0s
	1h 7m 19s

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