implement application properties filter

[Gsantomaggio]

This PR implements application properties filtering for AMQP streams, enabling consumers to filter messages based on their application-level properties. This completes the feature request tracked in issue #42.

Adds support for filtering messages by application properties in stream consumers
Updates the example to demonstrate both message properties and application properties filtering
Extends the StreamConsumerOptions class with application properties filter handling

[Copilot]

Pull Request Overview

This PR implements application properties filtering for AMQP streams, enabling consumers to filter messages based on their application-level properties. This completes the feature request tracked in issue #42.

• Adds support for filtering messages by application properties in stream consumers
• Updates the example to demonstrate both message properties and application properties filtering
• Extends the StreamConsumerOptions class with application properties filter handling

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
rabbitmq_amqp_python_client/entities.py	Adds constant for application properties filter spec and implements the filtering logic in StreamConsumerOptions
examples/streams_with_filters/example_streams_with_filters.py	Updates example to showcase application properties filtering alongside existing filters

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