Add support for signMessage in actions

[stwith]

I would like to propose adding support for the signMessage functionality in the actions module. The signMessage function is a fundamental user authentication feature that is essential for many web3 applications.

By incorporating signMessage support into the actions module, we can enable a broader range of non-asset related web3 functionalities. This will not only enhance the capabilities of our current applications but also allow web2 users who do not own any assets to experience the power and charm of web3.

Thank you for considering this feature request. Your support in implementing signMessage would greatly benefit the community and drive further adoption of web3 technologies.

[stwith]

@nickfrosty Hey, any updates of adding signMessage function?

[nickfrosty]

there is an open PR here that we expect to be merged soon:
#29