Refactor keyword handling: Replace 'intent' with 'country' across backend and frontend

- Updated AutomationService to include estimated_word_count.
- Increased stage_1_batch_size from 20 to 50 in AutomationViewSet.
- Changed Keywords model to replace 'intent' property with 'country'.
- Adjusted ClusteringService to allow a maximum of 50 keywords for clustering.
- Modified admin and management commands to remove 'intent' and use 'country' instead.
- Updated serializers to reflect the change from 'intent' to 'country'.
- Adjusted views and filters to use 'country' instead of 'intent'.
- Updated frontend forms, filters, and pages to replace 'intent' with 'country'.
- Added migration to remove 'intent' field and add 'country' field to SeedKeyword model.

backend/igny8_core/auth/serializers.py

@@ -524,14 +524,14 @@ class SeedKeywordSerializer(serializers.ModelSerializer):
     industry_slug = serializers.CharField(source='industry.slug', read_only=True)
     sector_name = serializers.CharField(source='sector.name', read_only=True)
     sector_slug = serializers.CharField(source='sector.slug', read_only=True)
-    intent_display = serializers.CharField(source='get_intent_display', read_only=True)
+    country_display = serializers.CharField(source='get_country_display', read_only=True)
     
     class Meta:
         model = SeedKeyword
         fields = [
             'id', 'keyword', 'industry', 'industry_name', 'industry_slug',
             'sector', 'sector_name', 'sector_slug',
-            'volume', 'difficulty', 'intent', 'intent_display',
+            'volume', 'difficulty', 'country', 'country_display',
             'is_active', 'created_at', 'updated_at'
         ]
         read_only_fields = ['created_at', 'updated_at']