This adds options that guard the usage of "experimental" theories or
extensions thereof when `--safe-options` is enabled.
This includes bags, finite fields, separation logic, higher-order logic,
and extensions of arithmetic (including transcendentals, iand and pow2).
The options `--sets-exp` (renamed from `--sets-ext` in this PR) and
`--fp-exp` continue to be disabled by default, thus do not need to
change.
Similar to other expert options, these theories can still be used with
`safe-options` if they are enabled prior to setting `safe-options`, e.g.
`--ho-exp --safe-options ...` allows HOL to be used. The options
configuration will only override the setting of `*-exp` options if not
set by user.
This does not impact the behavior of cvc5 when `--safe-options` is not
set.
FYI @alex-ozdemir @mudathirmahgoub @yoni206 .
This PR removes the expand_list_arg decorator from the python API. It was used to allow calling a function f(x, *args) with a list as second argument and automatically expand the list into *args. While it merely allows for calling f(x, l) instead of f(x, *l), it adds considerable complexity to the code and documentation. Thus, following the Zen of python (have only one way to do it) we remove this decorator. This is also consistent with the pythonic API, were we made the same decision.
