Create doc_issue.md

Introduce 'doc_issue.md' to improve documentation issue reporting for AgenticJS, with structured fields for clarity and efficiency in resolving issues.

.github/ISSUE_TEMPLATE/doc_issue.md

@@ -0,0 +1,16 @@
+---
+name: Doc Issue Report
+about: Create a doc issue report for AgenticJS documentation
+title: "[DOC ISSUE] - Issue title here"
+labels: documentation
+assignees: ''
+
+---
+
+### Describe the Issue
+A clear and concise description of what the issue is. Include any error messages, incorrect details, missing information, or misleading documentation.
+
+### Doc URL
+Provide the URL where the issue occurs, if applicable. 
+
+