refactor(schema): extract public event definitions (#33579)

packages/schema/src/legacy-event.ts

@@ -0,0 +1,18 @@
+export * as LegacyEvent from "./legacy-event"
+
+import { Schema } from "effect"
+import { define, inventory } from "./event"
+import { SessionID } from "./session-id"
+import { SessionV1 } from "./session-v1"
+
+export const CommandExecuted = define({
+  type: "command.executed",
+  schema: {
+    name: Schema.String,
+    sessionID: SessionID,
+    arguments: Schema.String,
+    messageID: SessionV1.MessageID,
+  },
+})
+
+export const Definitions = inventory(CommandExecuted)