Add native uuid type to ThingsDB

[joente]

Description

Adds the uuid native type to ThingsDB for making it easier to work with UUID's.
The implementation for creating new UUID's is using v7 UUID's, keeping the benefit of ordering and fast to generate.

• uuid() -> New UUID (v7)
• uuid(<string>) -> Converts a string to UUID (both lower and upper case allowed, with and without dashes)
• uuid(<bytes>) -> Converts (16) raw bytes to UUID
• str(uuid) -> Returns a lowercase string representation with dashes (equal to output, client json/msgpack)
• bytes(uuid) -> Returns a 16 byte representation of the UUID

Note: we could opt for returning the UUID as bytes to the client, but this would make it harder to work with and no direct compatibility with JSON.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Added a uuid test.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• New and existing unit tests pass locally with my changes