Migrate CLI E2E tests to Node.js 26

Run the CLI subprocess suites and benchmark tools as native TypeScript with
node:test, and move them under test/e2e-cli.

Update CI and Compose runners, run local smoke tests on Linux, macOS, and
Windows, and collect source-mapped CLI coverage with c8.

tsconfig.json

@@ -30,6 +30,7 @@
         "src/**/*.test.ts",
         "**/_test/**",
         "test/browser-apps",
+        "test/e2e-cli",
         "test/styles/*.deno.ts",
         "utilsdeno"
     ]