test(e2e): setup Playwright with login smoke test

- Installed @playwright/test + Chromium
- playwright.config.js: baseURL localhost:5001, Desktop Chrome
- tests/e2e/login.spec.js: validates login form loads and invalid
  credentials show error

package.json

@@ -0,0 +1,23 @@
+{
+  "name": "autopartes",
+  "version": "1.0.0",
+  "description": "**POS + Catalogo de autopartes para refaccionarias mexicanas.**",
+  "main": "index.js",
+  "directories": {
+    "doc": "docs"
+  },
+  "scripts": {
+    "test": "playwright test"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://consultoria-as:b708144ceef22fef31217f1259a695005d67477b@git.consultoria-as.com/consultoria-as/Autoparts-DB.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "devDependencies": {
+    "@playwright/test": "^1.59.1"
+  }
+}