fix(cli): upgrade yargs for Node.js 26 compatibility

[EAGzzyCSL]

midscene-test create fails on Node.js 26.7.0 with require is not defined in ES module scope when loading yargs 17.7.2's extensionless CommonJS entry inside its type: module package.

Upgrade the pinned yargs dependency in @midscene/test and @midscene/cli to 17.7.3 and update the lockfile. This patch release routes require('yargs/yargs') to yargs.cjs, fixing the incompatibility without a major-version upgrade. See yargs/yargs#2509 and yargs/yargs#2514.

Validation:

• pnpm run lint
• pnpm exec nx run-many --target=build --projects=@midscene/test,@midscene/cli
• pnpm exec nx test @midscene/test — 388 tests passed.
• pnpm exec nx run-many --target=test --projects=@midscene/test,@midscene/cli — CLI tests passed; Test initially failed due to stale Core build output and passed after rebuilding dependencies with the commands above.
• Node.js 26.7.0: pnpm --filter @midscene/test exec vitest --run --config vitest.e2e.config.ts tests/e2e/create-cli.test.ts -t 'creates a web project through the built CLI' — local smoke test passed. This test is an uncommitted local verification and is not included in this dependency-only PR.