new development/deployment/release process

[sam0x17]

Fixes #344

note that this merges into main because that is what determines the root CI settings for the repo once we change default branch back to main. May need to backport as well if there are still lingering branches on the day this is merged, but the idea of this PR is that once it is merged, all new PRs target main, so we shouldn't need to

will want to merge on the same day @garrett-opentensor makes the proper changes to the repo/branch protection settings, which are outlined in detail in the "branches" section of CONTRIBUTING.md