Added Dos and Don'ts table in Community Guidelines

Author: ArsenTech

CONTRIBUTING.md

@@ -134,6 +134,15 @@ We aim to keep this space **welcoming, informative, and peaceful**, not spammy o
 - Focus on ideas, not individuals.
 - Keep discussions inclusive and on-topic.
 - Remember: behind every contribution is a person.
+
+### Dos and Don'ts
+| ✅ Do                           | ❌ Don’t                 |
+| ------------------------------- | ------------------------- |
+| Follow branch naming convention | Edit README for no reason |
+| Test before submitting          | Submit broken builds      |
+| Use clear commit messages       | Spam “fix typo” PRs       |
+| Respect code owner reviews      | Bypass linting            |
+
 See our [Code of Conduct][code-of-conduct-url] for more.
 
 ## 🙌 A Note of Thanks