chore: create CODEOWNERS (privacy-scaling-explorations#301)

* chore: create CODEOWNERS

* docs: update CONTRIBUTING.md

.github/CODEOWNERS

@@ -0,0 +1,16 @@
+# These owners will be the default owners for everything in the repo.
+# They will be added as reviewers for PR related to configuration files.
+*       @cedoor @sripwoud
+
+# When someone opens a pull request that only modifies specific packages,
+# only the following users and not the default owners defined above will be
+# requested for a review.
+/packages/baby-jubjub/ @cedoor @artwyman
+/packages/eddsa-poseidon/ @cedoor @artwyman
+/packages/imt/ @cedoor
+/packages/lazytower/ @LCamel
+/packages/lean-imt/ @cedoor @vplasencia
+/packages/poseidon-cipher/ @ctrlc03
+/packages/poseidon-proof/ @cedoor @vplasencia @0xjei
+/packages/imt/ @cedoor
+/packages/utils/ @cedoor @artwyman

CONTRIBUTING.md

@@ -30,6 +30,9 @@ Pull requests are great if you want to add a feature or fix a bug. Here's a quic
 
 7. Push to your fork and submit a pull request on our `main` branch. Please provide us with some explanation of why you made the changes you made. For new features make sure to explain a standard use case to us.
 
+> [!NOTE]  
+> When a new package is created or a new feature is added to the repository, the contributor will be added to the `.github/CODEOWNERS` file to review and approve any future changes to their code.
+
 ## CI (Github Actions) Tests
 
 We use GitHub Actions to test each PR before it is merged.
@@ -46,7 +49,7 @@ We always use ESLint and Prettier. To check that your code follows the rules, si
 
 For commits it is recommended to use [Conventional Commits](https://www.conventionalcommits.org).
 
-Don't worry if it looks complicated, in our repositories, `git commit` opens an interactive app to create your conventional commit.
+Don't worry if it looks complicated. In our repositories, `git commit` opens an interactive app to create your conventional commit.
 
 Each commit message consists of a **header**, a **body** and a **footer**. The **header** has a special format that includes a **type**, a **scope** and a **subject**: