Walker: bind generic functions and member properties (mutableStateOf, MutableState.value) #38

Found while landing #18. pythonx-compose's declarative state (state() / .value, thisisthepy/pythonx-compose#11) needs androidx.compose.runtime.mutableStateOf and MutableState.value from Python. Today:

1. any declaration mentioning a type parameter is declined (resolveKotlinBoundary / renderKotlinTypeName accept only class classifiers), so mutableStateOf<T> cannot bind;
2. the walker emits only FUNCTION and STATIC_GETTER entries (ArtifactScanner keeps ACC_STATIC methods), so no instance member properties;
3. the binding layer's _attach installs methods only, never data descriptors, and looks at the exact declared type only.

Decided (coordinator), Kotlin names only:

• Walker: substitute Any? for unbounded, non-reified function type parameters; decline bounded or reified ones.
• Walker: bind public, non-extension, non-@composable member properties of public classes/interfaces as GETTER/SETTER entries (Owner.prop / Owner.prop=); setters only when all class type parameters are unbounded. Exclude GETTER/SETTER from the constructor-prefix collision rule and from overload disambiguation.
• Binding layer: index GETTER/SETTER by owner type; _attach installs property(fget, fset) with supertype lookup.
• Stubs: typed properties (coordinate with Stubs: emit proxy classes with typed members instead of int handles #31).
• Fixture: include SnapshotStateKt plus State/MutableState; switch PythonContentRenderTest from the KSP writeRoot stand-in to state.value = Root.

Risks to check explicitly: new generic bindings joining existing overload sets and changing mangled names tests rely on; table size growth over androidx.compose.ui (report before/after entry counts); the artifact fixture's "every table key is stubbed" invariant.

Completion: Python creates mutableStateOf(None), the host's PythonContent reads it, Python writes .value and the next frame shows the new root; all fixture modules and desktopTest green; entry-count delta reported.