Missing functions in fq_default

[GiacomoPope]

The methods

• fq_zech_is_primitive
• fq_nmod_is_primitive
• fq_is_primitive

and

• fq_zech_multiplicative_order
• fq_nmod_multiplicative_order
• fq_multiplicative_order

suggest we could have

• fq_default_is_primitive
• fq_default_multiplicative_order

I've not contributed to FLINT before but this seems fairly easy. I'm happy to do it but wanted to check if they weren't included before for a particular reason

[GiacomoPope]

I suppose the one catch here might be when the input has:

• _FQ_DEFAULT_TYPE(ctx) == _FQ_DEFAULT_NMOD
• _FQ_DEFAULT_TYPE(ctx) == _FQ_DEFAULT_FMPZ_MOD

as fmpz_mod and nmod dont seem to have these same functions. The "easy" thing to do in these two cases would be to take these values and construct fq and fq_nmod types from them, but it's not so elegant.

Maybe this is why these two special functions were not supported?