Add UUID built-in convenience type to SpacetimeDB

[mamcx]

Description of Changes

Closes #3290.

NOTES:

• Need help for the C++ part.
• Confirm names and overall direction before commit to make it mergeable

In draft because I need to confirm the impact of generate uuid::v7 variations in sorting across the different languages.

API and ABI breaking changes

We add a new type

Expected complexity level and risk

2

it impacts all over the code

Testing

• [ ]
• [ ]