github action fixes

[Christian-B]

grouped with SpiNNakerManchester/PACMAN#566

Only code change is that the default timeout on calls to 10 as manual tests on scripts sometimes timeout when not local to the server.

Tests this repository with the same global action.

• Had to add the input sphinx_director as it is different here

Some tests behaved different in Windows and mac.
Working out why left to a later PR

Added overrides markers

Added typing.

[Christian-B]

Remember that cast(type, variable) neither checks nor changes anything at runtime.
Used for speed to tell the typer trust me I know!

So
foo = 5.9
int(foo) = 6
while
cast(int, foo) == 5.9

But mypy or pay not detect the cast is wrong depending on how it typed foo