Kubectl explain show "example" section for CRD fields

Hello all.
How can users view examples for a field in CRD? `kubectl explain CRD.FIELD` doesn't show example section. for example:
```
....
gitBranchName:
default: main
description: Git branch name that will be used for building your app.
example: main
type: string
```
`kubectl explain crdName.spec.gitBranchName ` results to:

```
...

FIELD: gitBranchName
DESCRIPTION:
Git branch name that will be used for building your app.
```
It's useful for users to see examples of field in explain command.

Start by tracing the kubectl explain command's handling of CRD field schemas and how it formats the DESCRIPTION output. Verify the behavior with a CRD containing an example value, and consider the work complete when kubectl explain CRD.FIELD displays that example section.

Written by the indexing model from the issue text.