Adds the release documentation and reveals all cli commands for groups and teams channelMessages and files support.
---
#### Does this PR need a docs update or release note?
- [x] ✅ Yes, it's included
#### Type of change
- [x] 🗺️ Documentation
#### Issue(s)
* #3988
#### Test Plan
- [x] 💪 Manual
centralizes the ci action for slack messages, and adds slack messages for per-resource cleanup failures.
---
#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🤖 Supportability/Tests
#### Issues
- #3503
## Description
This reworks CI now that we have merged docs and website into a single deployment.
## Type of change
<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [x] 💻 CI/Deployment
- [ ] 🐹 Trivial/Minor
## Issue(s)
<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* Fixes https://github.com/alcionai/corso/issues/1551
## Test Plan
<!-- How will this be tested prior to merging.-->
- [x] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E
