better generic delimiters

Rust followed the unfortunate example of C++ by using <> for generics. oh-lang uses [] which is gramatically distinguishable from basic math expressions (x < 5) but it also allows for easier editor movement, since jumping to a matching start/end paren is a simple operation. for comparison, in oh-lang, an array of 32-bit signed integers is #array[#i32], while in Rust it would be Vec<i32> and C++ std::vector<int32_t>.

in Rust, you have to do things like MyClass::<i32>::MY_FIELD because MyClass<i32>::MY_FIELD would parse as a weird mathematical inequality (??). this is partly due to not being able to distinguish class names from variable names, but mostly due to using <>. it also bugs me that you can't just use MyNotGenericClass.MY_FIELD instead of MyNotGenericClass::MY_FIELD but i guess they wanted to let you know at the callsite that you're using a static variable. these minor syntax deviations are super helpful!

how many of you made it to the end of the post without getting distracted by the giant background gif?? congrats!