Add native Crystal exploration port and reference tooling

playwright.config.ts

@@ -0,0 +1,18 @@
+import { defineConfig, devices } from "@playwright/test";
+export default defineConfig({
+  testDir: "./tests",
+  testMatch: "**/*.spec.ts",
+  use: { baseURL: "http://127.0.0.1:5173", trace: "retain-on-failure" },
+  projects: [
+    { name: "chromium", use: { ...devices["Desktop Chrome"] } },
+    {
+      name: "webkit",
+      use: { ...devices["iPhone 13"], defaultBrowserType: "webkit" },
+    },
+  ],
+  webServer: {
+    command: "npm run dev -- --host 127.0.0.1",
+    url: "http://127.0.0.1:5173",
+    reuseExistingServer: !process.env.CI,
+  },
+});