feat: add codeowners (#339)

* feat: add codeowners

* feat(codeowners): add explicit owners for src, packages, tests, docs, and config files

* chore(codeowners): remove /docs/ from protected paths

Author: Raina451

.github/CODEOWNERS

@@ -0,0 +1,10 @@
+# CODEOWNERS file - defines code owners for automatic PR review requests
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+# Core source — any PR touching these paths requires codeowner approval
+/src/ @vnaren23 @Raina451 @swati354
+/packages/ @vnaren23 @Raina451 @swati354
+/tests/ @vnaren23 @Raina451 @swati354
+/package.json @vnaren23 @Raina451 @swati354
+/package-lock.json @vnaren23 @Raina451 @swati354
+/rollup.config.js @vnaren23 @Raina451 @swati354