Allow zero step in functions timeSeries*ToGrid This

Why it matters

Previously, the timeSeries*ToGrid functions did not support a zero step value, limiting flexibility in certain time series data transformations. This feature enables users to specify a zero step, expanding the ways time series data can be processed and summarized into grids.

How to use it

When using the timeSeries*ToGrid functions, you can now specify a step value of zero to control the granularity or behavior of the grid transformation explicitly. This is done by passing 0 as the step argument in these functions.