docs(changeset): Added AsyncAPI Parameter Object support for channel parameters

Author: radist2s

.changeset/tall-animals-sink.md

@@ -0,0 +1,7 @@
+---
+'@qraft/asyncapi-typescript-plugin': patch
+'@openapi-qraft/test-fixtures': patch
+---
+
+Added AsyncAPI `Parameter Object` support for channel parameters: we now type channel params as `string` by default and
+as literal unions when `enum` is provided, and we generate `location`/`enum`/`default` in `components.parameters`.