Create npm registry org and use @scope/forge-std

[sambacha]

@foundry-rs as registry org for npm, etc.

consider: https://www.npmjs.com/package/forge-std

this is a security issue potentially. Plus it makes sense for foundry to have a @org scope considering the other hardhat integrations etc.

[pyk]

current alternative installation:

pnpm add https://github.com/foundry-rs/forge-std/tarball/v1.9.2

then add node_modules to foundry.toml:

libs = ['node_modules']