create a standard, configurable dialog component for basic use cases

[samrichardsontylertech]

Describe the feature:
A simple dialog component for things like confirmations and alerts should be exported from the library to avoid the same thing being recreated across projects. The component should be standardized to comply with Forge guidance and accessibility best practices but configurable for a variety of use cases.

Describe any alternatives you've considered:
The dialog service already exposes a method to show dialogs, but the dialog components themselves need to be created per project. With simple confirmation or alert dialogs this has resulted in differing UXs, extra effort spent, and more opportunities for bugs. A single exported component would solved these problems.