[feat](trx-rs): add WFM RDS and playback controls

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

Cargo.lock

@@ -2432,6 +2432,7 @@ dependencies = [
  "tokio",
  "tracing",
  "trx-core",
+ "trx-rds",
 ]
 
 [[package]]
@@ -2555,6 +2556,13 @@ dependencies = [
  "trx-core",
 ]
 
+[[package]]
+name = "trx-rds"
+version = "0.1.0"
+dependencies = [
+ "trx-core",
+]
+
 [[package]]
 name = "trx-server"
 version = "0.1.0"