Add Values Replace

Add a value schedule bound to a key for use in a Prompt Scheduling node.

Inputs

value_key: The key for the value schedule. It may contain only a-z, A-Z, 0-9, and _. Refer to it in a prompt by surrounding it with backticks, for example `some_key`.
floats: A list of floats, typically produced by a Value Scheduling node.
prev_replace: Optional existing replacements, allowing multiple Values Replace nodes to be chained.