chore: add deploy job to test and deploy gh workflow

[Hunga1]

Added a deploy job to the test and deploy GitHub Action workflow that creates a new GitHub release when run for tags. Updated build status badge and Slack notification to cover deployments by the workflow.

Checklist

• [x] I acknowledge that all my contributions will be made under the project's license
• [x] I have made a material change to the repo (functionality, testing, spelling, grammar)
• [x] I have read the Contribution Guidelines and my PR follows them
• [x] I have titled the PR appropriately
• [x] I have updated my branch with the main branch
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] I have added the necessary documentation about the functionality in the appropriate .md file
• [x] I have added inline documentation to the code I modified