Count warm cells on a grid

[ebocher]

This PR introduces a new indicator to count the number of warm cells using a sliding window.

For example, if the user wants to count the number of hot cells in a 3*3 window, it must add the COUNT_WARM_1 term to the list of grid indicators.

The number 1 corresponds to the cell offset from the center of the processed cell.
The user can add several window sizes like this : COUNT_WARM_1 , COUNT_WARM_2, COUNT_WARM_5.

Input LCZ grid

Number of warn cells (COUNT_WARM_1)

Number of warn cells (COUNT_WARM_4)

Config file input

            "parameters"  :
                      ["distance"             : 500,
                       "rsu_indicators"       : [
                               "indicatorUse": ["LCZ"] 

                       ], "grid_indicators"   : [
                              "x_size"    : 100,
                              "y_size"    : 100,
                              "indicators": [
                                      "LCZ_PRIMARY",
                                      "COUNT_WARM_1",
                                      "COUNT_WARM_4"]
                      ],...

@MGousseff @j3r3m1