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/tui/test/render-churn-bench.ts

@@ -57,6 +57,7 @@ class NullTerminal implements Terminal {
 	clearScreen(): void {}
 	setTitle(_title: string): void {}
 	setProgress(_active: boolean): void {}
+	setProgramStatus(): void {}
 }
 
 /** Editor stand-in: caches lines per (text, width), re-renders when text changes. */