Update README with new Kafka resources

[jonasbest]

Added new resources for Python stream processing, Connectors, Kafka Replication, and UI.

[gemini-code-assist]

Summary of Changes

Hello @jonasbest, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the README.md by incorporating several new Kafka-related resources. The additions cover various categories, including Python stream processing frameworks, Kafka Connectors, replication tools, general development tooling, and user interface options, providing a more comprehensive guide for users exploring the Kafka ecosystem.

Highlights

• Python Stream Processing: Added 'Bytewax - Python Stateful Stream Processing Framework' to the list of Python stream processing resources.
• Kafka Connectors: Included 'Stream Reactor - Collection of Apache 2.0 connectors to popular sources and sinks' in the connectors section.
• Kafka Replication: Appended 'K2K' to the Kafka replication tools.
• Kafka Tools: Introduced 'Lenses.io DevX Tooling' to the general Kafka tools section.
• Kafka UI: Listed 'Lenses' as a new UI resource.

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[gemini-code-assist]

Code Review

This pull request adds several new resources to the awesome-kafka list. The additions are relevant, but I have a couple of suggestions to improve clarity and avoid redundancy in the README. I've suggested adding a description to the K2K tool and pointed out a potentially redundant entry for Lenses.io tooling.