First iteration to provide WildFly example

[ehsavoie]

What does this PR do?

First iteration to provide WildFly example

Screenshot/screencast of this PR

This PR adds the wildfly sample devfile.

What issues does this PR fix or reference?

How to test this PR?

PR Checklist

As the author of this Pull Request I made sure that:

• [ ] The Eclipse Contributor Agreement is valid
• [ ] Code produced is complete
• [ ] Code builds without errors
• [ ] Tests are covering the bugfix
• [ ] The repository devfile is up to date and works
• [ ] Sections What issues does this PR fix or reference and How to test this PR completed
• [ ] Relevant user documentation updated
• [ ] Relevant contributing documentation updated
• [ ] CI/CD changes implemented, documented and communicated

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[svor]

@ehsavoie for che samples we have https://github.com/che-samples and for DS samples it's https://github.com/devspaces-samples if you'd like to move your sample into it, I can create repositories for you

[ibuziuk]

@ehsavoie we are currently working on migration to the https://devfile.io/ and do recommend contributing the new sample to https://github.com/devfile/registry