Fixes codechecks reports

Fix in the generation of the artifacts & doc update

Fail CI if coverage threshold checks fail

fix (generate-artifacts): Unicode fix for the output files  = '\' replaced with '/' because \u is considered a symbol & build throws an error

Docs generation for the Contracts + GH action for detecting missing Natspec comments.  

Increase branch coverage 

ci: Fix merge bug in CircleCI YAML

I encountered merge conflicts in the CircleCI YAML, and missed a stanza that builds proxyd.

ci: Add Slack notifications to nightly deployment

fix: message relayer docker build

maintenance: remove eslint-plugin-ban dependency

packages/contracts: Remove legacy `bin/deploy.ts` script

Removes the `bin/deploy.ts` script, which was a holdover from before the regenesis and was little more than a wrapper around `npx hardhat deploy`. The functionality that used to live in `bin/deploy.ts` has been moved into `ops/scripts/deployer.sh`, since the old script's functionality was exclusively run in CI.

Metadata:

- Fixes ENG-1447

ci: Add proxyd to nightly build

Metadata:

- Fixes ENG-1677