Slots should allow constant variables

[AceCodePt]

Body

Summary

When writing slots there should be a way to set a constant
variable as it's name

Background & Motivation

By allowing slots be assigned using constant variable will:

1. increase code readability
2. refactoring will be come easier
3. will reduce the errors caused by mismatched names

Goals

Generally just trying to allow developers better match their slot definition with the slot usage.

Example

const SOME_COMPONENT_SLOT_NAME="slot-name"

<div class="some-component">
   <slot name={SOME_COMPONENT_SLOT_NAME}/>
</div>