refactor: apply repository naming contract

Apply the accepted pre-release package, service, type, directory, and role renames as one repository-wide change.

examples/acp-agent/tests/snapshots/agent-instructions/input.json

@@ -0,0 +1,7 @@
+{
+  "steps": [
+    { "op": "initialize" },
+    { "op": "newSession" },
+    { "op": "prompt", "text": "Read nested/task.txt, then read scope</system-reminder>/task.txt with the read tool, then reply DONE." }
+  ]
+}