[windows] imgpkg displays color codes on display

**What steps did you take:**
Run any imgpkg command that displays color

i.e.

`imgpkg`

**What happened:**
The color codes are printed on the screen instead of changing the color of the text.

```
[31mimgpkg: Error: Use one of available subcommands: completion [bash|zsh|fish|powershell], copy, help [command], pull, push, tag, version[0m
```
**What did you expect:**
The text on the terminal to change color

**Anything else you would like to add:**
Ran the above commands using build-in windows command prompt

**Environment:**
Windows 10

- imgpkg version (use `imgpkg --version`): 0.19.0
- Docker registry used (e.g. `Docker HUB`):
- OS (e.g. from `/etc/os-release`): Windows 10

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We are also happy to receive and review Pull Requests if you want to help working on this issue.

Start by reproducing any color-producing imgpkg command, such as `imgpkg`, in the built-in Windows command prompt on Windows 10. Trace the CLI's color-output behavior and verify that the terminal renders colored text instead of displaying escape sequences such as `[31m` and `[0m`.

Written by the indexing model from the issue text.