feat(average): Add orbit error and correction command moving average

* Same generic bloc for operations
* Capture the stream of data and retains accumulator in memory
* Mirror memory for CPU readout

wip: initial commit

wip: Now a more generic bloc

wip: Add average tables to RDL

wip: integrate ma for oe in toplevel

wip: first corrections for simulation, alpha declared in package

wip: fixes for simulation

wip: fixes, secondary memory is smaller, no decimal part

wip: true rounding before wrinting to secondary memory

wip: Add average for PSC command

wip: fix sign extension on average orbit read