fix(ci): lazy-load TypeScript in ts guard utils

scripts/lib/ts-guard-utils.mjs

@@ -1,7 +1,15 @@
 import { promises as fs } from "node:fs";
+import { createRequire } from "node:module";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
-import ts from "typescript";
+
+const require = createRequire(import.meta.url);
+let tsCache;
+
+function getTypeScript() {
+  tsCache ??= require("typescript");
+  return tsCache;
+}
 
 const baseTestSuffixes = [".test.ts", ".test-utils.ts", ".test-harness.ts", ".e2e-harness.ts"];
 
@@ -113,6 +121,7 @@ export function toLine(sourceFile, node) {
 }
 
 export function getPropertyNameText(name) {
+  const ts = getTypeScript();
   if (ts.isIdentifier(name) || ts.isStringLiteral(name) || ts.isNumericLiteral(name)) {
     return name.text;
   }
@@ -120,6 +129,7 @@ export function getPropertyNameText(name) {
 }
 
 export function unwrapExpression(expression) {
+  const ts = getTypeScript();
   let current = expression;
   while (true) {
     if (ts.isParenthesizedExpression(current)) {