chore(vendor): import pi 0.85.1

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: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/packages/tui/src/native-module-path.ts

@@ -0,0 +1,31 @@
+import { createRequire } from "node:module";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const moduleRequire = createRequire(import.meta.url);
+const TUI_PACKAGE_NAME = "@earendil-works/pi-tui";
+
+export interface NativeModuleCandidateOptions {
+	moduleUrl?: string;
+	execPath?: string;
+	resolvePackage?: (specifier: string) => string;
+}
+
+export function getNativeModuleCandidates(nativePath: string, options: NativeModuleCandidateOptions = {}): string[] {
+	const moduleDir = dirname(fileURLToPath(options.moduleUrl ?? import.meta.url));
+	const candidates: string[] = [];
+
+	try {
+		const packageEntry = (options.resolvePackage ?? moduleRequire.resolve)(TUI_PACKAGE_NAME);
+		candidates.push(join(dirname(packageEntry), "..", nativePath));
+	} catch {
+		// Standalone binaries do not have an installed TUI package.
+	}
+
+	candidates.push(
+		join(moduleDir, "..", nativePath),
+		join(moduleDir, nativePath),
+		join(dirname(options.execPath ?? process.execPath), nativePath),
+	);
+	return Array.from(new Set(candidates));
+}