message: chore(all): encourage contributors to read the contribution guideline
diff: Switch to the `Preview` mode and **choose** a `PR template`.
  +Read the [Contribution guideline](https://github.com/cam-inc/viron/blob/develop/CONTRIBUTING.md).
  +
  - [General](?expand=1&template=general.md) to create any kind of PRs except for versioning.
  - [Version](?expand=1&template=version.md) to set new version for packages.
  