Please describe the use case that requires this feature.

@mdpunch wants to investigate performance on reduced-window operations for GRBs.

Describe the solution you'd like

A new Component that reduces the window size, configurable per telescope.

Should also adjust the subarray description.

Describe alternatives you've considered

@mdpunch ran his own analysis in notebooks, but doesn't scale to a full production and also missed crucial parts of the process tool (e.g. storing shower histograms).

An alternative would be to instead of adding this specific usecase, we add a more general plugin system of "hook" components that can be defined in plugins and that are included in ctapipe-process at specific positions.

Additional context
Add any other context or screenshots about the feature request here.