Change `get_energy_timeseries` function to pypsa dispatch function

Feature Request

We should change our get_energy_timeseries(n) function to the pypsa.statistics.StatisticsAccessor.dispatch() method. The advantage of this is that we can simplify our code and take advantage of pypsa testing their functions. Note, we need to double check we care assuming same logic for link power dispatch

Suggested Solution

I believe these two are equivalent:

1. (current) get_energy_timeseries(n)
2. (proposed) StatisticsAccessor(n).dispatch(aggregate_time=False).T

Additional Info

No response

Start by locating the current get_energy_timeseries(n) implementation and compare its behavior with StatisticsAccessor(n).dispatch(aggregate_time=False).T. Check specifically whether link power dispatch follows the same logic, then run the existing tests or add coverage for the comparison; done means the replacement preserves the required timeseries behavior.