Adds `aliases` to the dump-help output.

[jglogan]

• Closes #812.

Closes #812 by adding aliases to DumpHelpGenerator and ToolInfo.

Checklist

• [x] I've added at least one test that validates that my change is working, if appropriate
• [x] I've followed the code style of the rest of the project
• [x] I've read the Contribution Guidelines
• [ ] I've updated the documentation if necessary