📦 deps: update portabletext/types and cypress dependencies

This update bumps @portabletext/types from v2.0.15 to v3.0.0 and
cypress from 15.5.0 to 15.6.0 to ensure the project uses the latest
stable versions of these development dependencies.

Author: w3bdesign

DOCS/repository_context.txt

@@ -18823,7 +18823,7 @@ tsconfig.json
 58:     "@ladle/react": "^5.1.1",
 59:     "@lhci/cli": "^0.15.1",
 60:     "@playwright/test": "^1.56.1",
-61:     "@portabletext/types": "^2.0.15",
+61:     "@portabletext/types": "^3.0.0",
 62:     "@tailwindcss/postcss": "^4.1.16",
 63:     "@testing-library/cypress": "^10.1.0",
 64:     "@testing-library/jest-dom": "^6.9.1",
@@ -18837,7 +18837,7 @@ tsconfig.json
 72:     "@typescript-eslint/parser": "^8.46.3",
 73:     "@typescript-eslint/utils": "^8.46.3",
 74:     "axe-core": "^4.11.0",
-75:     "cypress": "15.5.0",
+75:     "cypress": "15.6.0",
 76:     "cypress-axe": "^1.7.0",
 77:     "eslint": "9.39.1",
 78:     "eslint-config-next": "16.0.1",