Add markdown rendering test file

rendering_test.md

@@ -0,0 +1,59 @@
+# Markdown Rendering Test
+
+This file tests Gitea's ability to render various Markdown elements.
+
+## 1. Text Formatting
+*Italic*, **Bold**, ***Bold Italic***, ~~Strikethrough~~, Inline Code
+
+## 2. Lists
+### Unordered
+- Item 1
+- Item 2
+  - Subitem 2.1
+  - Subitem 2.2
+
+### Ordered
+1. Step One
+2. Step Two
+3. Step Three
+
+### Task List
+- [x] Completed task
+- [ ] Incomplete task
+
+## 3. Code Blocks
+\\python
+def hello_world():
+    print('Hello, Gitea!')
+\
+\\json
+{
+  " key\: \value\,
+ \list\: [1, 2, 3]
+}
+\
+## 4. Tables
+| Feature | Supported | Notes |
+| :--- | :---: | ---: |
+| Tables | Yes | Left/Center/Right aligned |
+| Code | Yes | Syntax highlighting |
+| Images | Yes | Should render |
+
+## 5. Blockquotes and Alerts
+> This is a standard blockquote.
+> It can span multiple lines.
+
+> [!NOTE]
+> This is a Gitea/GitHub style alert.
+
+> [!WARNING]
+> Proceed with caution!
+
+## 6. Links and Images
+[Gitea Website](https://gitea.io)
+
+![Gitea Logo](https://gitea.io/images/gitea.png)
+
+## 7. Mathematical Formulas (if enabled)
+d:\Project\GitBasedDevelopmentEnvironmentSetup \sqrt{3x-1}+(1+x)^2 d:\Project\GitBasedDevelopmentEnvironmentSetup
+