Auto merge of rust-lang#14083 - Veykril:issue-templates, r=lnicola

Add more basic issue templates with auto category labeling

Author: bors

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: Bug report
 about: Create a bug report for rust-analyzer.
 title: ''
-labels: ''
+labels: 'C-bug'
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,8 @@
+---
+name: Feature Request
+about: Create a feature request for rust-analyzer.
+title: ''
+labels: 'C-feature'
+assignees: ''
+
+---

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,8 @@
+---
+name: Support Question
+about: A question regarding functionality of rust-analyzer.
+title: ''
+labels: 'C-support'
+assignees: ''
+
+---