Suppose a user propagator encodes axioms using quantifiers and uses E-matching for instantiation. If it wants to implement a custom priority scheme or drop some instances based on internal checks it can register a callback with quantifier instantiation
* Fixed decide callback for Java user propagators
* Java User Prop:
- Added return value to conflict
- Added consequence method
- Added missing access modifier to decideWrapper
* Removed type parameters of expressions in UserPropagatorBase
* Renamed propagateConflict to propagateConsequence
Use built-in `importlib.resources` module rather than the external
`importlib_resources` package on Python 3.9 and newer. The latter
is only intended as a backport for old Python versions, and since modern
Linux distributions may no longer support such old Python versions,
they also no longer provide importlib_resources (this is the case
on Gentoo).
This happens when generating the Python API and you are using
Python 3.12 in the build environment:
```
.../z3/scripts/update_api.py:1828: SyntaxWarning: invalid escape sequence '\#'
```
This was a `DeprecationWarning` previously, but Python 3.12 changed
it to a `SyntaxWarning` to make it more visible. The release notes
indicate that this will be a syntax error in the future.
