refactor(feed): improve feed command logic

- Refactored the logic in the FeedCommand class to improve readability and maintainability.
- Updated the variable names for better clarity.
- Added a createDefaultFeed method to create a default Feed object with necessary settings.

README.atom

@@ -1,12 +1,45 @@
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   <title type="text">❤️ 每天收集喜欢的开源项目</title>
   <subtitle type="text">❤️ 每天收集喜欢的开源项目</subtitle>
-  <updated>2024-04-10T00:00:00+08:00</updated>
-  <generator>https://github.com/guanguans</generator>
+  <updated>2024-04-11T00:00:00+08:00</updated>
+  <generator uri="https://github.com/guanguans/favorite-link">favorite-link</generator>
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-  <link rel="self" type="application/atom+xml" href="https://github.com/guanguans/favorite-link/links.atom"/>
+  <link rel="self" type="application/atom+xml" href="https://raw.githubusercontent.com/guanguans/favorite-link/master/README.atom"/>
   <id>https://github.com/guanguans/favorite-link</id>
+  <author>
+    <name>guanguans</name>
+    <email>[email protected]</email>
+    <uri>https://github.com/guanguans</uri>
+  </author>
+  <entry>
+    <title type="html"><![CDATA[Intervention/gif: 原生 PHP GIF 编码器/解码器]]></title>
+    <published>2024-04-11T00:00:00+08:00</published>
+    <updated>2024-04-11T00:00:00+08:00</updated>
+    <link rel="alternate" type="text/html" href="https://github.com/Intervention/gif"/>
+    <id>https://github.com/Intervention/gif</id>
+  </entry>
+  <entry>
+    <title type="html"><![CDATA[drawdb-io/drawdb: 免费、简单、直观的在线数据库设计工具和 SQL 生成器。]]></title>
+    <published>2024-04-11T00:00:00+08:00</published>
+    <updated>2024-04-11T00:00:00+08:00</updated>
+    <link rel="alternate" type="text/html" href="https://github.com/drawdb-io/drawdb"/>
+    <id>https://github.com/drawdb-io/drawdb</id>
+  </entry>
+  <entry>
+    <title type="html"><![CDATA[phpcolor/phpcolor: PHP 颜色操作库]]></title>
+    <published>2024-04-11T00:00:00+08:00</published>
+    <updated>2024-04-11T00:00:00+08:00</updated>
+    <link rel="alternate" type="text/html" href="https://github.com/phpcolor/phpcolor"/>
+    <id>https://github.com/phpcolor/phpcolor</id>
+  </entry>
+  <entry>
+    <title type="html"><![CDATA[zhuima/awesome-cloudflare: ⛅️ 精选的 Cloudflare 工具、开源项目、指南、博客和其他资源列表。]]></title>
+    <published>2024-04-11T00:00:00+08:00</published>
+    <updated>2024-04-11T00:00:00+08:00</updated>
+    <link rel="alternate" type="text/html" href="https://github.com/zhuima/awesome-cloudflare"/>
+    <id>https://github.com/zhuima/awesome-cloudflare</id>
+  </entry>
   <entry>
     <title type="html"><![CDATA[lubusIN/laravel-decomposer: ⚙️ 一个 Laravel 包，用于分解您安装的包、它们的依赖关系、您的应用程序和服务器环境]]></title>
     <published>2024-04-10T00:00:00+08:00</published>