Update issue templates

Add a new "General Question" template
Also make sure new feature request issues are marked with "new" label

Author: chkuang-g

.github/ISSUE_TEMPLATE/--general-question.md

@@ -0,0 +1,28 @@
+---
+name: "❓ General question"
+about: Describe this issue template's purpose here.
+title: "[Question] "
+labels: 'new, type: question'
+assignees: ''
+
+---
+
+<!-- DO NOT DELETE
+validate_template=true
+template_path=.github/ISSUE_TEMPLATE/--general-question.md
+-->
+
+### [READ] For Firebase Unity SDK question, please report to [Firebase Unity Sample](https://github.com/firebase/quickstart-unity/issues/new/choose)
+
+Once you've read this section and determined that your issue is appropriate for this repository, please delete this section.
+
+### [REQUIRED] Please fill in the following fields:
+
+  * Pre-built SDK from the [website](https://firebase.google.com/download/cpp) or open-source from this repo: _____
+  * Firebase C++ SDK version: _____
+  * Main Firebase Components in concern: _____ (Auth, Database, etc.)
+  * Other Firebase Components in use: _____ (Auth, Database, etc.)
+  * Platform you are using the C++ SDK on: _____ (Mac, Windows, or Linux)
+  * Platform you are targeting: _____ (iOS, Android, and/or desktop)
+
+### [REQUIRED] Please describe the question here:

.github/ISSUE_TEMPLATE/feature-request.md

@@ -1,8 +1,12 @@
 ---
-name: ➕ Feature request
+name: "➕ Feature request"
 about: If you have a feature request for the Firebase C++ SDK, file it here.
+title: ''
 labels: 'type: feature request'
+assignees: ''
+
 ---
+
 <!-- DO NOT DELETE
 validate_template=true
 template_path=.github/ISSUE_TEMPLATE/feature-request.md

.github/ISSUE_TEMPLATE/issue.md

@@ -1,7 +1,10 @@
 ---
-name: 🐞 Bug report
+name: "\U0001F41E Bug report"
 about: Please use this template to report bugs with the Firebase C++ SDK.
+title: ''
 labels: new
+assignees: ''
+
 ---
 
 <!-- DO NOT DELETE