docs: add issue template (#806)

Author: mgechev

.github/ISSUE_TEMPLATE/---bug-report.md

@@ -0,0 +1,44 @@
+---
+name: "\U0001F41B Bug report"
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+
+A clear and concise description of what the bug is.
+
+**Context and configuration**
+
+Please share:
+ - Which rule is causing the problem
+ - What's the content of your `tsconfig.json`
+ - What's the content of `~/.codelyzer.js` (if applicable)
+
+**To Reproduce**
+
+Steps to reproduce the behavior.
+
+**Expected behavior**
+
+A clear and concise description of what you expected to happen.
+
+**Code**
+
+Share the code which will let us reproduce the problem
+
+**Environment**
+
+ - Version [e.g. 22]
+ - OS: [e.g. iOS]
+ - Node.js version
+ - Package manager (yarn/npm) version
+ - Angular version
+ - tslint version
+
+**Additional context**
+
+Add any other context about the problem here.