imgui/.github/pull_request_template.md

- If you are adding a feature, please explain the context of the change: what do you need the feature for?
- Try to attach screenshots to clarify the context and demonstrate the feature at a glance.
- Make sure you create a branch for the pull request. In Git, 1 PR is associated to 1 branch. If you keep pushing to the same branch after you submitted the PR, your new commits will appear in the PR.
- You can read [CONTRIBUTING.md](https://github.com/ocornut/imgui/blob/master/.github/CONTRIBUTING.md) for more details.

(Clear this form before submitting your PR)