Notate our choice of common libraries used in docs

[SilentCicero]

We should notate what common libraries we use for regular actives in the docs.

Such as the use of the hex module for going from string <> hex. The rand module for RNG etc.

First time developers shouldn't need to think to much about which proper libraries to use for these things.

In the vein of Ethers, you can also wrap common methods in rust-rs so that developers can just use the SDK to do the above instead of having to go to other modules.

Yes, it's more bulk, but ultimately more ergonomic.