added swaggest php implementation and benchmark

[vearutop]

No description provided.

[Relequestual]

@vearutop Curious, what's with the name "Swaggest"? Because of Swagger?

[vearutop]

Yes, it is meant to be a "Very Much Swagger" tool to handle serialization and validation. :)

[Relequestual]

Just to confirm, you do know that the swagger implementation of JSON Schema isn't the same as "pure" JSON Schema, in terms of validation?

[vearutop]

Yes I confirm, this is "pure" JSON Schema library, that is used as a base for https://github.com/swaggest/php-swagger2-schema which is a Swagger/OpenAPI tool.

Now I feel a bit sorry for misleading name.

[Relequestual]

I was pretty sure, but just wanted to make sure.
mmmm naming things is hard!