Create a custom Terraform Plugin Framework UUID type

[ethanndickson]

Currently, we store UUIDs in Terraform resources & data sources as instances of types.String (basetypes.Stringtype). This is an issue as it means:

• We convert strings to UUIDs to call codersdk functions that accept a UUID.
• We convert codersdk returned UUIDs to strings to store them in Terraform resources/data sources.
• We have no guarantees that a non-null, non-unknown ID field stores a valid UUID.

We can fix this by implementing a Terraform Plugin Framework custom type, as per the documentation.

[johnstcn]

@ethanndickson can you provide more information and/or context on this issue please?

[ethanndickson]

Apologies, fixed.