Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: "[<COMMAND>]: short bug description "
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**OS (please complete the following information):**
+ - [ ] Linux
+ - [ ] OSX
+ - [ ] Windows
+
+**Shell (please complete the following information):**
+ - [ ] Bash
+ - [ ] Elvish
+ - [ ] Fish
+ - [ ] Nushell
+ - [ ] Oil
+ - [ ] Powershell
+ - [ ] Xonsh
+ - [ ] Zsh
+
+**Additional context**
+Add any other context about the problem here.