feat: Add events generator

[castastrophe]

Add events to the generator

• Add an events query to the generator

Testing instructions

Be sure to include detailed instructions on how your update can be tested by another developer.

1. Run 'npm run new'

? What would you like to create? content
? Element name (i.e. pfe-card) pfe-foo
? Author name castastrophe
? Do you want to use Sass with this element? Yes
? Do want to use existing Sass dependencies? pfe-sass
? Describe the element's purpose or goal. Do a thing.
? List any attributes for the element, separated by commas (i.e., color, priority) one,two
? List any named slots for the element, separated by commas (i.e., header, footer) three,four
? List any events you want registered for the element, separated by commas (i.e., change, click) click,tab

2. Check the README and pfe-foo.js for content specific to the events you entered.

Your repository infrastructure updates should work for at least:

• Node v8.x
• NPM v7.x

Ready-for-merge Checklist

• Expected files: all files in this pull request are related to one feature request or issue (no stragglers)?
• Did you update or add any necessary documentation (README.md, WHY.md, etc.)?
• Was this feature demo'd and the design review approved?
• Did you update the CHANGELOG.md file with a summary of this update?

Be sure to share your updates with the patternfly-elements-contribute@redhat.com mailing list!

[eyevana]

Worked like a charm! :)