feat: add CountrySelect component and integrate country selection in endorsement, seafarer, and waiver pages

package.json

@@ -27,6 +27,8 @@
     "@tanstack/react-query": "^5.99.0",
     "@tria-plc/iamui": "file:local-packages/tria-plc-iamui-0.1.1.tgz",
     "clsx": "^2.1.1",
+    "country-flag-icons": "^1.6.20",
+    "country-list": "^2.4.1",
     "date-fns": "^4.1.0",
     "dayjs": "^1.11.20",
     "i18next": "^25.6.0",
@@ -49,6 +51,7 @@
     "@nx/react": "^22.5.4",
     "@nx/vite": "^22.5.4",
     "@nx/vitest": "^22.5.4",
+    "@types/country-list": "^2.1.4",
     "@types/js-cookie": "^3.0.6",
     "@types/node": "^22.0.0",
     "@types/react": "^19.2.17",