Issue template with redirection to Firebase repo (#34)

* Issue template with redirection to Firebase repo

* Line break

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Google Data Transport
+    url: https://github.com/firebase/firebase-ios-sdk/issues/new/choose
+    about: Google Data Transport is not supported for direct usage. Please file with the product library that depends on Google Data Transport.

.github/ISSUE_TEMPLATE/issue_report.md

@@ -0,0 +1,8 @@
+---
+name: 🐞 Internal Issue
+about: Googlers may file issues here or to track with [Firebase](https://github.com/firebase/firebase-ios-sdk/issues/new/choose)
+---
+<!-- DO NOT DELETE
+validate_template=true
+template_path=.github/ISSUE_TEMPLATE/bug_report.md
+-->