Added convert workflow to strip SAML signature

[sdcampbell]

Please ensure your pull request adheres to the following guidelines:

• Follow the same folder structure as other workflows (see template).
• Has a proper author name and workflow description.
• If using compiled code in JS Nodes, provide the source code for each.
• If using a 3rd party library, include its license as a comment in the source code.

Thanks for contributing!

[Sytten]

Hi! Thanks for the contribution, we are slowly moving toward the store to publish the workflows. I will let you know when we write the guide.