Give attribute-like intrinsic form

[matt-cornell]

As intrinsics are used for more things, writing them as functions can quickly become verbose. In addition, it goes against the more natural left-to-right flow of information if they're being called like functions.

To remedy this, an alternate syntax is proposed. @intrin(x) can be written as x.@intrin. While this may not seem significant for a single call, take a more advanced example:

allocate(@size_align(@type(x))); # fairly clear, but a lot of parentheses. also requires you to read right to left.
allocate(x.@type.@size_align); # clear and concise, read left to right. draws more attention to the object that these are an attribute of, not the intrinsic itself.

[matt-cornell]

Merged from main to fix @treemcgee42's linking errors.