Add Kiefer–Chatterjee model, and LEM oriented track structure model

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See https://sci-hub.mksa.top/10.1088/0031-9155/53/1/003

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Kiefer–Chatterjee model

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LEM oriented track structure model

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LEM oriented track structure model should be equivalent to:

• Geiss RDD https://github.com/libamtrack/library/blob/b6b6d16bd85e30f875ba91cd313ccb42ab8f9fde/src/AT_RDD.c#L181
• Scholz ER model AT_ER_Scholz_range_g_cm2, see https://github.com/libamtrack/library/blob/master/src/AT_ElectronRange.c#L84
• Rc = a0 = 0.01 um = 10 nm