* x64: port scalar `fcmp` to ISLE Implement the CLIF lowering for the `fcmp` to ISLE. This adds a new type-matcher, `ty_scalar_float`, for detecting uses of `F32` and `F64`. * isle: rename `vec128` to `ty_vec12` This refactoring changes the name of the `vec128` matcher function to follow the `ty_*` convention of the other type matchers. It also makes the helper an inline function call. * x64: port vector `fcmp` to ISLE