## Changes
The CLI test runner instantiates a new CLI "instance" through
`cmd.New()` and runs it with specified arguments. This is as close as we
get to running the real CLI **in-process**. This runner was located in
the `internal` package next to other helpers. This change moves it to
its own dedicated package.
Note: this runner transitively imports pretty much the entire
repository, which is why we intentionally keep it _separate_ from
`testutil`.
## Tests
n/a
## Changes
Use cmdio in the version command such that it accepts the `--output` flag.
This removes the existing `--detail` flag which previously made the
command print JSON output.
## Tests
New integration test passes.
## Changes
With this PR, all of the command below print version and exit:
```
$ databricks -v
Databricks CLI v0.100.1-dev+4d3fa76
$ databricks --version
Databricks CLI v0.100.1-dev+4d3fa76
$ databricks version
Databricks CLI v0.100.1-dev+4d3fa76
```
## Tests
Added integration test for each flag or command.
Pieter Noordhuis