refactor!: rename .arguments to .$args for functions

[antfu]

When we write exports.default.arguments[0].foo = 'bar', it can be a bit ambiguous to tell wether arguments is from us, or it's a real property. I think it could be better to have more explicit utils prefixed with $

[pi0]

Indeed magic keys via proxy on top level can always make this ambiguousness and we are exposing some non $ prefixed ones. But i expect we always have to check $type before operating on one key. In what situation do you think for type of function-call it can be problematic?

[antfu]

Yeah it shouldn't be a big problem. What I am thinking is that we could keep the syntax close as runtime as possible. While the function call is a new thing we introduced on top of the runtime, so it could be better to distinguish them.

[pi0]

Makes sense. BTW i guess we had to call it .$params o .$parameters as function calling params :D Wdyt?

[antfu]

I am ok with both. But checking the docs https://developer.mozilla.org/en-US/docs/Glossary/Parameter and https://en.wikipedia.org/wiki/Parameter_(computer_programming) - it looks like arguments make a better fit for function calls? parameters should be used in the function declaration.