Grant full registry access privileges to repository maintainer

This access level will allow the maintainer to make exceptions for specific libraries owned by an entity whose
privileges have been revoked.

Author: per1234

.github/workflows/assets/accesslist.yml

@@ -1,4 +1,8 @@
 # Access control for the Arduino Library Manager registry.
 # This file is used by https://github.com/arduino/library-registry-submission-parser, via the "Manage PRs" workflow.
 
-[]
+# Allowlist
+- host: github.com
+  name: per1234
+  access: allow
+  reference: