Contributing guidelines (initial version) (#94)

CONTRIBUTING.md

@@ -0,0 +1,18 @@
+# Contributing
+
+Any feedback / contribution are welcome. Just open an `issue`, a `PR` or start a `discussion`.
+
+## Code style / conventions
+
+- Try to write [clean, idiomatic Rust code](https://github.com/mre/idiomatic-rust).
+- Keep code [DRY](https://en.wikipedia.org/wiki/Don%27t_repeat_yourself) whenever it makes sense.
+- Before pushing any code make sure to run `clippy` and `fmt`. Check provided [`just`](./jusfile) file to run such commands, [CI](https://github.com/sectore/timr-tui/blob/main/.github/workflows/ci.yml) will do the same.
+- Have fun to write code.
+
+## Design files
+
+Use [Figma Design file](https://www.figma.com/community/file/1553076532392275586/timr-tui) to suggest design changes
+
+## AI
+
+Always understand what AI provides to you. Never push any code based on [`vibe coding`](https://en.wikipedia.org/wiki/Vibe_coding) you or anybody else can't follow. Make sure your agent still follows all code styles and conventions suggested above. Use AI for better, not for worse code.

README.md

@@ -17,6 +17,7 @@ Built with [Ratatui](https://ratatui.rs/) / [Rust 🦀](https://www.rust-lang.or
 - [Installation](./#installation)
 - [Development](./#development)
 - [Misc](./#misc)
+- [Contributing](./#contributing)
 - [License](./#license)
 
 # Preview
@@ -303,6 +304,10 @@ C:/Users/{user}/AppData/Local/timr-tui/logs/app.log
 
 Optional: You can use a custom directory by passing it via `--log` arg.
 
+# Contributing
+
+[CONTRIBUTING.md](./CONTRIBUTING.md)
+
 # License
 
 [MIT License](./LICENSE)