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/coding-agent/test/agent-session-dynamic-tools.test.ts

@@ -153,7 +153,7 @@ describe("AgentSession dynamic tool registration", () => {
 			origin: "top-level",
 		});
 		expect(readTool?.sourceInfo).toMatchObject({
-			path: "<builtin:read>",
+			path: "builtin:read",
 			source: "builtin",
 			scope: "temporary",
 			origin: "top-level",