doc: add documentation issue template (#433)

* doc: add documentation issue template
* chore: auto add documentation label

.github/ISSUE_TEMPLATE/--documentation.md

@@ -0,0 +1,23 @@
+---
+name: "\U0001F4DDDocumentation"
+about: Suggest incorrect/improvement in documentation
+title: ''
+labels: 'documentation'
+assignees: ''
+
+---
+
+**Describe the issue with documentation**
+A clear and concise description of what the issue is.
+
+**To Reproduce (observed behavior)**
+Steps to reproduce the behavior (please share code or minimal repo)
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Additional context**
+Add any other context about the problem here.