Support `GO( 1, q )`, `SO( 1, q )`, `Omega( 1, q )`, `Omega( -1, 2, q )`

[ThomasBreuer]

Currently GAP supports GO( e, n, q ), SO( e, n, q ), Omega( e, n, q ) only for n larger than 1, and also Omega( -1, 2, q ) is not supported.

(This was observed in oscar-system/Oscar.jl/pull/351.)

I think it would be good to admit also n = 1 and Omega( -1, 2, q ).
(The ATLAS states on p. xi that "the groups are boring for n at most 2", but they can be useful in recursions.)

I can provide a pull request if there are no objections.

[fingolfin]

No objections, such a PR would be welcome, thanks!