HDK Proc Macro package name

[StaticallyTypedAnxiety]

As we spoke last week, we have yet to come up with a resolution to the issue of the hdk proc macro package name. As we have it, the proc macro hdk is named hdk_proc_macro but since we are moving towards publishing it to crates.io we need o decide on the naming scheme. Should this be changed to hdk_v2 or should we keep it as hdk_proc_macro.

The benefits of hdk_proc_macro are that developers won't have to change the name in their toml however, the naming scheme is a bit weird as compared to hdk_v2

[willemolding]

As an alternative we could merge #1645 before we do the crates.io release and just pretend the original HDK never happened?

[willemolding]

I've just realized this isn't really possible in current Rust. Proc macro crates can only export proc macros so it is impossible to have a single HDK crate. This kinda sucks I think

For this reason though I argue strongly against hdk_v2 since consumers will always need both crates. Eventually we can just remove the old macros from the hdk crate