chore: add @Adi-204 to CODEOWNERS as templates champion that joins maintainers list (#1685)

Co-authored-by: Lukasz Gornicki <lpgornicki@gmail.com>

Author: derberg

CODEOWNERS

@@ -6,7 +6,16 @@
 
 # The default owners are automatically added as reviewers when you open a pull request unless different owners are specified in the file.
 
+# Core Maintainers
 * @derberg @magicmatatjahu @jonaslagoni @asyncapi-bot-eve
 
+# Packages directory
+# @Adi-204 is Templates Champion
+packages/ @Adi-204 @derberg @magicmatatjahu
+
 # All .md files
+# @Florence-Njeri is Docs Champion
 *.md @Florence-Njeri @derberg @asyncapi-bot-eve
+
+# Changeset markdown files — override so Docs Champions aren't requested
+.changeset/**/*.md @derberg @magicmatatjahu @asyncapi-bot-eve