Update issue templates

Add question template and other small changes.

Author: champnic

.github/ISSUE_TEMPLATE/feature---api-request.md

@@ -0,0 +1,24 @@
+---
+name: Feature / API request
+about: Suggest an idea for WebView2
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+<!--
+    A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+  -->
+
+**Describe the solution you'd like and alternatives you've considered**
+<!--
+    A clear and concise description of what you want to happen. This may include:
+    - Description of what API need to be added or changed.
+    - Does this API already exist in another WebView-like product? (CEF, WebBrowser, etc.)
+    - Code that shows the surface area of the API.
+    - Code that shows real world scenarios, and how they would otherwise be handled.
+    - Details showing the usage/consumption of the proposed new API, and alternatives (e.g. not having this API).
+    - Any other context or screenshots about the feature request here.
+  -->

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,10 @@
+---
+name: Question
+about: Have a question about WebView2?
+title: ''
+labels: question
+assignees: ''
+
+---
+
+