Update issue templates

Added optimization template

.github/ISSUE_TEMPLATE/optimization-needed.md

@@ -0,0 +1,17 @@
+---
+name: Optimization Needed
+about: Something already works but it could be made better
+title: "[Optimization]"
+labels: enhancement
+assignees: ''
+
+---
+
+## Optimization Needed
+Talk about things like
+- Where the system run slow
+- What you don't like about its color, button location or UI
+- Places where it is inconvenience to use
+
+## Screenshots
+Provide screenshot if possible