One-line installation for medusa

[anishnaik]

Due to issues with forking and go install (golang/go#44840), we need to identify a way to have one-line installation for all major platforms (outside of downloading the binaries directly).

We might have to pivot away from go install because there does not seem to be any momentum from the Golang team to loosen the restriction on the replace directive. More research into alternate solutions is required.

A decent solution could be to create a toolchain manager, similar to foundryup, that will manage installation and upgrades of medusa.