Preparing merge PR for RPCv2 CBOR

[SamRemis]

Changes included:

• Bugfix on string serialization,
• minor PR feedback on the parsers file
• fixing a broken import
• adds a changelog
• no longer relies on the default byte order for int.to_bytes that was introduced in 3.11
• runs pre-commit on the cbor decoding tests.

Note, this is still into the merge PR branch. I'll open a final PR to develop after this is merged, but at that point everything will have been approved

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##             rpcv2-cbor-protocol-support    #3406   +/-   ##
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