chore(vendor): import pi 1.3.0

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/chord/test/fixtures/echo.ts

@@ -0,0 +1,11 @@
+import { Type } from "typebox";
+import { hostNamed, method, remote } from "../../src/index.ts";
+
+export const Echo = remote("t.echo", {
+	version: 1,
+	input: Type.Object({}),
+	host: hostNamed("w1"),
+	variants: {
+		main: { methods: { echo: method(Type.String(), Type.String()), pid: method(undefined, Type.Number()) } },
+	},
+});