Add an explanation regarding our release cadence

[f5yacobucci]

This commit sets expectations for when consumers can expect releases
during the formative stages of the project. It also lays out a way for
consumers to track where a release is at.

As a squad we need to properly tag each github issue with the proper
milestone and labels where appropriate.

• [ X] I have read the CONTRIBUTING doc
• [ N/A] I have added tests that prove my fix is effective or that my feature works
• [ X] I have checked that all unit tests pass after adding my changes
• [ X] I have updated necessary documentation
• [ X] I have rebased my branch onto main
• [ X] I will ensure my PR is targeting the main branch and pulling from my branch from my own fork