Add matrix of supported features per platform on the README

[BoD]

Matrix taken from #3244 and tweaked a bit 😄

I've put iosX64 and iosArm64 on the same column to simplify (and macosX64 and macosArm64 can also be merged later when macosArm64 is supported).

Also added a row for apollo-adapters but not 100% sure it's needed.

[martinbonnin]

👍 . I'd leave macosArm64 out for now. This is a matrix for "supported" platforms. Everything not in the matrix is unsupported. There's no specific reason to include macosArm64 and not display tvosArm64 or mingw64 for an example.

apollo-adapter is good to include 👍 . Nit: swap the line with http-cache so that the matrix is as "diagonal" as possible.

[BoD]

I'd leave macosArm64 out for now. This is a matrix for "supported" platforms. Everything not in the matrix is unsupported. There's no specific reason to include macosArm64 and not display tvosArm64 or mingw64 for an example.

You're totally right, it didn't make much sense 😅