feat: Add initial search page text to l10n

- Added headline to search page
- Added subheadline to search page

Author: fulleni

lib/l10n/arb/app_ar.arb

@@ -622,5 +622,14 @@
     "searchHintTextCountry": "مثال: الولايات المتحدة, اليابان, البرازيل...",
     "@searchHintTextCountry": {
         "description": "Hint text for searching countries"
+    },
+
+    "searchPageInitialHeadline": "ابدأ بحثك",
+    "@searchPageInitialHeadline": {
+        "description": "Generic headline for the initial state of the search page"
+    },
+    "searchPageInitialSubheadline": "اختر نوعًا وأدخل كلمات رئيسية للبدء.",
+    "@searchPageInitialSubheadline": {
+        "description": "Generic subheadline for the initial state of the search page"
     }
 }

lib/l10n/arb/app_en.arb

@@ -622,5 +622,14 @@
     "searchHintTextCountry": "e.g., USA, Japan, Brazil...",
     "@searchHintTextCountry": {
         "description": "Hint text for searching countries"
+    },
+
+    "searchPageInitialHeadline": "Start Your Search",
+    "@searchPageInitialHeadline": {
+        "description": "Generic headline for the initial state of the search page"
+    },
+    "searchPageInitialSubheadline": "Select a type and enter keywords to begin.",
+    "@searchPageInitialSubheadline": {
+        "description": "Generic subheadline for the initial state of the search page"
     }
 }