use msgspec for json serialization/deserialization and to replace typed-json with msgpack

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Feature description

Use msgspec for json serialization/deserialization and to replace typed-json with msgpack. The idea for the ticket is to:

Continue the work done on #1439 branch exp/1539-msgspec-json

• Use msgspec json encoder/decoder for pure json
• Pass all tests, check if pretty format json is supported
• Use its msgpack encoder/decoder for typed_dump - which will produce msgpack document, not our typed-json document.

Are you a dlt user?

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Use case

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Proposed solution

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Related issues

#1539