Move the existing Requirements creation and edit forms to a slide out drawer

Since we are moving towards having a slide out drawer to provide additional details for a Requirement, we need to also relocate the current Requirement creation and edit forms to this drawer as well so that we are not creating a disconnect between the read-only states and the edit states.

The scope of this issue includes:

• On selecting the New Requirement button, present the current form (which for now just includes Title) in a slide-out drawer
• On selecting the Edit (pencil) button, present the current form (which for now just includes Title) in a slide-out drawer
• On submit of either form, maintain the current toast message and dismiss/close the drawer
• On cancel (or ESC key), dismiss/close the drawer
• Add a heading for "New Requirement" and "Edit Requirement" to the associated forms