(feat): added mermaid rendering support in markdown (#676)

test-mermaid.md

@@ -0,0 +1,46 @@
+# Mermaid Test File
+
+## Simple Flowchart
+```mermaid
+graph TD
+    A[Start] --> B{Is it working?}
+    B -->|Yes| C[🎉 Success!]
+    B -->|No| D[Check console]
+    D --> B
+    C --> E[End]
+```
+
+## Sequence Diagram
+```mermaid
+sequenceDiagram
+    participant U as User
+    participant A as App
+    participant G as GitHub
+    
+    U->>A: Upload repo
+    A->>G: Fetch data
+    G-->>A: Repository content
+    A->>A: Anonymize
+    A-->>U: Show result
+```
+
+## Simple Pie Chart
+```mermaid
+pie title Test Languages
+    "JavaScript" : 50
+    "CSS" : 30
+    "HTML" : 20
+```
+
+## State Diagram
+```mermaid
+stateDiagram-v2
+    [*] --> Idle
+    Idle --> Processing
+    Processing --> Complete
+    Complete --> [*]
+    Processing --> Error
+    Error --> [*]
+```
+
+If you can see the diagrams above rendered as interactive graphics (not as code blocks), then Mermaid is working correctly!