MM-63669 E2E/Playwright: Move "e2e-tests/playwright/test" to "e2e-tests/playwright" folder (#30647)

* move "e2e-tests/playwright/test" to  "e2e-tests/playwright/test" and expose "ensurePluginsLoaded"

* add test setup, and expose ensurePluginsLoaded and ensureServerDeployment to pw

e2e-tests/playwright/package.json

@@ -1,26 +1,33 @@
 {
   "name": "mattermost-playwright",
-  "private": true,
-  "workspaces": [
-    "lib",
-    "test"
-  ],
+  "workspaces": ["lib"],
   "scripts": {
-    "postinstall": "npm run build",
-    "build": "npm run build --workspaces --if-present",
-    "build:watch": "npm run build:watch --workspaces --if-present",
-    "clean": "rm -rf node_modules package-lock.json logs results test-results && npm run clean --workspaces --if-present",
-    "tsc": "npm run tsc --workspaces --if-present",
+    "postinstall": "script/post_install.sh && npm run build",
+    "build": "npm run build --workspaces",
+    "build:watch": "npm run build:watch --workspaces",
+    "tsc": "tsc -b && npm run tsc --workspaces",
     "lint": "eslint .",
     "prettier": "prettier . --check",
     "prettier:fix": "prettier --write .",
     "check": "npm run lint && npm run prettier && npm run tsc",
-    "test": "npm run test --workspace=test",
-    "test:ci": "npm run test:ci --workspace=test"
+    "test": "cross-env PW_SNAPSHOT_ENABLE=true playwright test",
+    "test:ci": "cross-env PW_SNAPSHOT_ENABLE=true playwright test --project=chrome",
+    "test:update-snapshots": "cross-env PW_SNAPSHOT_ENABLE=true playwright test --update-snapshots",
+    "test:slomo": "cross-env PW_SNAPSHOT_ENABLE=true PW_SLOWMO=1000 playwright test",
+    "percy": "cross-env PERCY_TOKEN=$PERCY_TOKEN PW_PERCY_ENABLE=true percy exec -- playwright test --project=chrome --project=ipad",
+    "codegen": "cross-env playwright codegen $PW_BASE_URL",
+    "playwright-ui": "cross-env playwright test --ui",
+    "show-report": "npx playwright show-report results/reporter",
+    "clean": "rm -rf dist node_modules package-lock.json *.tsbuildinfo logs results storage_state test-results && npm run clean --workspaces"
   },
   "dependencies": {
+    "@mattermost/client": "file:../../webapp/platform/client",
+    "@mattermost/playwright-lib": "*",
+    "@mattermost/types": "file:../../webapp/platform/types",
+    "@playwright/test": "1.51.1",
+    "cross-env": "7.0.3",
     "dayjs": "1.11.13",
-    "@playwright/test": "1.51.1"
+    "zod": "3.24.2"
   },
   "devDependencies": {
     "@typescript-eslint/eslint-plugin": "8.29.0",