Add DuckDuckGo and Google News wrappers; refactor CryptoPanic and NewsAPI

- Implemented DuckDuckGoWrapper for news retrieval using DuckDuckGo tools.
- Added GoogleNewsWrapper for accessing Google News RSS feed.
- Refactored CryptoPanicWrapper to unify get_top_headlines and get_latest_news methods.
- Updated NewsApiWrapper to simplify top headlines retrieval.
- Added tests for DuckDuckGo and Google News wrappers.
- Enhanced documentation for CryptoPanicWrapper and NewsApiWrapper.
- Created base module for social media integrations.

tests/api/test_duckduckgo_news.py

@@ -0,0 +1,35 @@
+import pytest
+from app.news import DuckDuckGoWrapper
+
+
+@pytest.mark.news
+@pytest.mark.api
+class TestDuckDuckGoNews:
+
+    def test_news_api_initialization(self):
+        news = DuckDuckGoWrapper()
+        assert news.tool is not None
+
+    def test_news_api_get_latest_news(self):
+        news = DuckDuckGoWrapper()
+        articles = news.get_latest_news(query="crypto", total=2)
+        assert isinstance(articles, list)
+        assert len(articles) == 2
+        for article in articles:
+            assert article.source is not None or article.source != ""
+            assert article.time is not None or article.time != ""
+            assert article.title is not None or article.title != ""
+            assert article.description is not None or article.description != ""
+
+
+    def test_news_api_get_top_headlines(self):
+        news = DuckDuckGoWrapper()
+        articles = news.get_top_headlines(total=2)
+        assert isinstance(articles, list)
+        assert len(articles) == 2
+        for article in articles:
+            assert article.source is not None or article.source != ""
+            assert article.time is not None or article.time != ""
+            assert article.title is not None or article.title != ""
+            assert article.description is not None or article.description != ""
+