We should prefix all sample commands in help and docs with m365.

In v2, you could use CLI in immersive and non-immersive. With its own command prompt, you could directly execute all commands without the o365 prefix in immersive mode. The prefix was needed only in non-immersive mode. To avoid confusion, we decided to not use the prefix, just include command names and let users use the prefix or not depending if they used the CLI in immersive or non-immersive mode.

Since we're removing immersive mode in v3, we should prefix all commands with m365 in docs and help so that users can simply copy-paste the sample command and execute it.