Support for various data types of resource attributes and id

[maurei]

Resources with attributes of various data types should be thoroughly tested. The following data types should be considered:

• DateTime, DateTimeOffset, TimeSpan, DateOnly, TimeOnly
• decimal, double, float
• signed and unsigned: int, long, short, byte
• guid
• bool
• string, char
• enum
• tuples
• collections
• complex attributes

Also take into consideration:

• nullability of above types where applicable
• all EF Core supported datatypes for identifying keys should be considered
• see https://swagger.io/docs/specification/data-models/data-types/

~Also address the following: When using Identifiable<TId> where TId is other than string, eg int, the generated client will have its id parameter typed as int in methods, which is incorrect: it should always be string.~

[bkoelman]

Should include support for DateOnly and TimeOnly, which were added in .NET 6.