* Add static analysis github action
setup python and install slither

* Add nvmrc file for setting node to v14.17

* Update slither command run to link missing contract packages from monorepo root

* Add steps for installing dependencies

* Add yarn build step to github action

* Enable colour in github action for static analysis

* Disable certain detectors

* Ensure slither does not fail build

* Add instructions on running static analysis to monorepo readme