feat: Add profile and region variables

[Ileriayo]

Description

This change adds profile and region variables so that the user can specify which AWS account on their machine they would like to use. It also updates the terraform.tfvars.sample to include variables for using GitHub apps instead of Personal Access Tokens.

Motivation and Context

A user may have more than one AWS account and would like to use either. This change allows them to specify which AWS profile to use, other than the default profile. It also allows you to specify a region rather than hard-coding it. If no region is specified, the original hard-coded region has been made the default.

Breaking Changes

No breaking changes

How Has This Been Tested?

• [x] I have updated at least one of the examples/* to demonstrate and validate my change(s)
• [x] I have tested and validated these changes using one or more of the provided examples/* projects
• [ ] I have executed pre-commit run -a on my pull request

[bryantbiggs]

thank you for the PR but this is not a valid change - this is an example and users are responsible for configuring the provider to suite their requirements

[github-actions[bot]]

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