Document import order

closes oxc-project/oxc#12723

Author: Boshen

src/docs/contribute/rules.md

@@ -32,6 +32,13 @@ outline: deep
 - Monitor code coverage for unused code. Aim for 99% code coverage.
 - Actively monitor and work on reducing the CI time to speed up merging of PRs. The current CI time on GitHub actions is around 3 minutes.
 - Documentation first - documentation should serve as the source of truth. Keep the documentation updated and share the link instead of repeatedly answering the same questions. See GitLab's [handbook-first](https://handbook.gitlab.com/handbook/company/culture/all-remote/handbook-first) approach.
+- Consistent import orders: "furthest away" to "closest".
+    - `std`
+    - External crates
+    - Oxc crates
+    - Local crate (`crate`)
+    - `super`
+    - `mod`
 
 ## Conventional Commits