fix(typing): accept Mapping type in resolve() for event parameter

Change resolve() event parameter type hint from dict[str, Any] to
Mapping[str, Any] to allow Powertools event data classes (e.g.,
LambdaFunctionUrlEvent) to be passed without type errors.

This is backwards compatible since dict is a subtype of Mapping.

Closes #7864

Author: Iamrodos

aws_lambda_powertools/event_handler/api_gateway.py

@@ -2461,7 +2461,7 @@ def register_resolver(func: AnyCallableT) -> AnyCallableT:
 
         return register_resolver
 
-    def resolve(self, event: dict[str, Any], context: LambdaContext) -> dict[str, Any]:
+    def resolve(self, event: Mapping[str, Any], context: LambdaContext) -> dict[str, Any]:
         """Resolves the response based on the provide event and decorator routes
 
         ## Internals