Get environment details with r10k

The r10k deploy display command returns information about your environments and modules. This subcommand does not deploy environments, it only displays information about the environments and modules r10k is managing.

This command can return various levels of detail about the environments:

To get information about all environments r10k manages, run:
```
r10k deploy display
```
To get information about all managed environments and modules declared in their Puppetfiles, append the Puppetfile flag (-m). For example:
```
r10k deploy display -m
```
To get expected and actual versions of modules in all environments, append the -m and --detail flags. For example:
```
r10k deploy display -m --detail
```
To get expected and actual versions of modules in specific environments, append the -m and --detail flags along with one or more environment names, such as:
```
r10k deploy display -m --detail <ENVIRONMENT_NAME> <ENVIRONMENT_NAME>
```