chore(issue): add issue template

Author: feyy

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,21 @@
+### Issue
+
+
+### Expected Behavior
+
+
+### Code
+
+```javascript
+
+```
+
+### Environment
+
+1. `react-native -v`:
+2. `node -v`:
+3. `npm -v`:
+4. `yarn --version`<!-- (if you use Yarn) -->:
+5. `target platform`: Android | iOS
+6. `operating system`: 
+