Missing provider and creds examples

[jeremyp-synopsys]

Description

The examples and documentation do not currently include the provider statement for using the provider from the terraform registry. The documentation also states to refer to examples/creds.json, but the file doesn't exist.

Motivation and Context

Provide examples and documentation for using provider from registry

How Has This Been Tested?

Currently using

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist

• [x ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [x ] I have added tests to cover my changes if appropriate.
• [x ] All new and existing tests passed.

[welcome-to-palo-alto-networks[bot]]

:tada: Thanks for opening this pull request! We really appreciate contributors like you! :raised_hands:

[wfg]

Thanks for filling this gap, @jeremyp-synopsys!

[welcome-to-palo-alto-networks[bot]]

:tada: Congrats on getting your first pull request merged! We here at Palo Alto Networks are so grateful! :heart: