[Feature Request] Extend `--detect` to use environment variables available when running in Azure Pipelines

**Is your feature request related to a problem? Please describe.**
Azure Pipelines must be one of the key platforms on which `az devops` is employed. Azure Pipelines sets a number of environment variables that point to the current repository.

It would be nice if `--detect` would be able to leverage these variables

**Describe the solution you'd like**

Azure pipelines always sets these two variables:

```
--organization $env:SYSTEM_COLLECTIONURI `
--project $env:SYSTEM_TEAMPROJECT
```
When using `--detect` to automatically detect the organization or project, it should pick up these variables.

Why?

* it's faster than reading the git remote data
* it's available by default on Azure Pipelines
* It works in pipelines that have: `-checkout: none`

Why not?

* There are cases where people check out a different repo than the one that owns the pipeline (e.g. `- checkout: https://github.com/something/something.git`). Those workflows would break if they relied on `--detect` and the environment variables would take precedence.

**Additional context**
Add any other context or screenshots about the feature request here.