Add issue templates

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

@@ -0,0 +1,26 @@
+---
+name: Bug Report
+about: Create a report to help me improve
+title: ''
+labels: bug
+assignees: RatzzFatzz
+
+---
+
+**Environment**
+
+Java Version: [e.g. 8, 11, 17]
+
+MKV Audio Subtitle Changer version: [e.g. v1.1, v2.0]
+
+**Describe the bug**
+
+A clear and concise description of what the bug is.
+
+**Expected behavior**
+
+A clear and concise description of what you expected to happen.
+
+**Additional context**
+
+Add any other context about the problem here.

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

@@ -0,0 +1,12 @@
+---
+name: Feature Request
+about: Tell me about something you would want me to add
+title: ''
+labels: feature-request
+
+---
+
+**Describe your feature**
+
+A clear and concise description of the expected behaviour. 
+