FeatureRequest: Add refactor issue template

[kenibrewer]

Feature type

• Add new functionality

• Change existing functionality

General description of the proposed functionality

None of the existing issue templates apply well to situations where the a code refactoring is being suggested that is not a new feature or bugfix.

Feature example

Example refactor request we might adapt below. Taken from https://raw.githubusercontent.com/inovex/elements/master/.github/ISSUE_TEMPLATE/refactor-request.md

---
name: Refactor Request
about: Suggest something that needs to be refactored.
title: ''
labels: discussion, new
assignees: ''
---

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### Refactor Request

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Is your refactor request related to a problem? Please describe.

A clear and concise description of what the problem is. Ex. I'm having problems reading the code because [...]
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### Description of the proposed solution

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### Additional context

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Alternative Solutions

No response

Additional information

No response