new alert for permissions

[iArchitSharma]

Notes for Reviewers
New alert type added
USE
Use the following Syntax to add a Alert:
{{< alert type="success" title="Note" >}} Your Note {{< /alert >}}

• type="danger": Alert used to indicate something related to security.
• type="info": Alert used to write some information.
• type="warning": Alert used to indicate a warning that might need attention.
• type="neutral": Alert used to indicate a neutral information.
• type="success": Alert used to indicate a positive information.

By default, if you don't specify a title title="Your Title", the title will be the same as the type name.

This PR fixes #123

Signed commits

• Yes, I signed my commits.

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[leecalcote]

@iArchitSharma will you add this new style and its intended use to a Layer5 Docs Contributing guide?

[iArchitSharma]

sure @leecalcote

[leecalcote]

Darn you, DNS

[iArchitSharma]

Done @leecalcote

[leecalcote]

@iArchitSharma, this is good, but you need to think as a maintainer, asking what's good for the docs overall, not just getting done what specifically needs to be done for your single pull request.

Make sure that this is a general description of the manner in which our docs support info / notes / tips / alerts and so on, not just a permission alert.

[leecalcote]

Make a complete list of supported styles with example use, please.

[leecalcote]

This same thing already be done and measure the docs. If you don't find it, please create one. But, there should be one already.