Provide an overload for the create functions that doesn't have a broker parameter

[PaulRBerg]

While writing the docs, I realized the UX of creating streams is tarnished by the requirement to import several data types from the @sablier/v2-core package. The broker parameter is particularly problematic because, as a struct, it occupies quite a bit of screen space. I expect many users will prefer to leave it uninitialized (i.e. set zero values for the broker address and broker fee).

It'd be nice to offer a broker-free overload for each of the create functions:

• createWithDeltas
• createWithDurations
• createWithMilestones
• createWithRange

[PaulRBerg]

For some reason I have completely forgotten that we're using structs now 😅

Thus, it isn't possible to provide overloads that don't have the broker parameter.