release a stable version of npm package under filecoin-project

[longfeiWan9]

After we moved filecoin-solidity to filecoin-project, we have not released npm package for devs to use under any filecoin-project account instead of Zondax. So if devs want to install filecoin-solidity, the only option for them is still @zondax/filecoin-solidity which point to the old Zondax version. Actions need to be taken:

• [ ] release a stable version of filecoin-solidity, and published to npm with filecoin-project account. For example, @filecoin-project/filecoin-solidity
• [ ] update README and Filecoin docs so devs can use the right version.

[trruckerfling]

@bojinovic a favour please, is it possible to address these changes in step 1 outlined here? https://github.com/filecoin-project/fvm-pm/issues/867#issue-2330495520