Add Webview to scaffold sample execution-environment.yml file using creator add subcommand

[abhikdps]

Summary

This PR adds a new webview for adding a sample execution-environment.yml file to an existing destination path.

Available fields:

• Destination Path: The path where the sample execution-environment.yml file gets added. If the destination path does not exist, an error message comes up.

Webview

Related JIRA: AAP-36883

[alisonlhart]

(moving this comment from the previous PR)
I'm wondering if we need to keep the log output to file, copy logs, and open log file options - similar to how the devfile webview currently is.
@audgirka What do you think?

[alisonlhart]

Can you also add an entry in the codecov.yml file for createSampleExecutionEnvPageApp.ts? (see https://github.com/ansible/vscode-ansible/pull/1719/files)
This is because webpack mangles the app files to the point where codecov cannot read coverage data.