introduce Polar coordinate detector interface and Endcap ITKStrip detector
This MR introduces the ITkStrip detector as an example for the polar coordinate for endcap detector.
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Currently this emphasis on the implementation for the ITkECStrip, so the PolarDetector has no generic implementation. If needed, there is a preliminary description
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Since some calculations, e.g. residual or position of cluster are different in cartesian/polar coordinate, functions regarding these are defined in the detector class so that in Algorithm modules can keep common interfaces
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In the naming of Polar/ITk detector, the getLocalPosition remains the same meaning of getting a point in local cartesian coordinate(defined by transfrom in geometry), the getLocalPolarPostion apples to get the polar position.
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In the future, the ITkStrip detector will be moved to resource directory which aims to store user defined detectors
fo one module of the Double-sided R0 data after alignment, with posx,posy, rotx,roty,rotz
