moved etc into usr folder

files/system/usr/etc/skel/.tmux/plugins/tmux/CONTRIBUTING.md

@@ -0,0 +1,40 @@
+# Contributing
+
+## Design
+
+To understand our mindset in developing this plugin and how to ensure your
+changes align with that mindset, check out the "[Design Philosophy](./docs/explanation/design.md)."
+
+## Commit messages
+
+This repository uses [Conventional Commits](https://conventionalcommits.org).
+Commit headers should be lowercase. Most commits should include a body that briefly
+describes the motivation and content of the commit.
+
+### Commit types
+
+- `fix`: A bug fix that doesn't modify the public API
+- `feat`: A code change that adds functionality
+- `change`: A modification to the public API
+- `deprecate`: Something in the public API has been deprecated
+- `remove`: A part of the public API has been removed
+- `refactor`: A code change that doesn't change behavior
+- `style`: A style fix or change
+- `docs`: Any change to documentation
+- `revert`: A revert commit. The message should describe the reasoning and the
+  commit should include the `Refs:` footer with the short hashes of the commits
+  being reverted.
+- `chore`: catch-all type
+
+### Breaking changes
+
+All breaking changes should be documented in the commit footer in the format
+described by Conventional Commits. Use the `<type>!` syntax in order to distinguish
+breaking commits in the log, but include the footer to provide a better description
+for the changelog generator.
+
+```text
+feat(bar)!: foo the bars
+
+BREAKING CHANGE: bars are now foo'ed
+```