Automatically exclude common repository files from input files

[BernieWhite]

PSRule will automatically scan files in a repository using -Format File. This process will scan all files recursively in the path.

Within a repository there are commonly some files which are generally of little interest such as:

• README.md
• .gitignore
• LICENSE
• CODE_OF_CONDUCT.md
• CONTRIBUTING.md
• SECURITY.md
• SUPPORT.md
• Notices.txt
• ThirdPartyNotices.txt
• .vscode/settings.json
• .vscode/tasks.json
• .vscode/extensions.json
• .github/PULL_REQUEST_TEMPLATE.md

The contents of these files are generally of little consequence and not of interest.

While these files can be excluded via the Input.PathIgnore option it would be easier if these could just be excluded as an option.

i.e. Input.IgnoreRepositoryCommon