docs: update issue templates, include Feature request (#225)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,6 +1,6 @@
 ---
 name: Bug report
-about: Create a report to help us improve
+about: Create a report to help us improve Terra Draw
 title: "[Bug]"
 labels: bug
 assignees: ''

.github/ISSUE_TEMPLATE/feature-request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for Terra Draw
+title: "[Feature Request]"
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. 
+
+**Describe your proposed idea for the solution to this problem**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered. For example would this be possible with a custom mode or adapter?
+
+**Additional context**
+Add any other context or screenshots about the feature request here.