rust-pyo3-revlog: config extraction functions We put this aside in a separate submodule to avoid cluttering the main `revlog` module. We use two helpers to extract items from the passed Python configuration: an extension trait for `PyDict` and a macro. As the macro uses `intern!`, it might make a small differences if lots of revlogs have to be opened. Also, using `conf` in namings instead of `py_config` in most cases, as the fact that this is Python configuration is obvious from the context (name of the module) and the types. This allows to let many item extractions fit into a single line.

--- a/rust/hg-pyo3/src/revlog/mod.rs	Tue Dec 24 18:14:07 2024 +0100
+++ b/rust/hg-pyo3/src/revlog/mod.rs	Tue Dec 24 18:56:32 2024 +0100
@@ -10,6 +10,8 @@
 
 use crate::util::new_submodule;
 
+mod config;
+
 pub fn init_module<'py>(
     py: Python<'py>,
     package: &str,