Add issue templates

Fixes #10.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,35 @@
+---
+name: Bug report
+about: When something doesn't work
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+<!--
+NOTE: When talking about scrolling up or down, use the same meaning that Emacs uses in its scroll-up and scroll-down commands. Scrolling up means the text goes up, not the view of the window.
+-->
+
+**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.
+
+**Videos**
+If applicable, add GIFs or videos to help explain your problem. GitHub allows uploading these directly to issues.
+
+**Version and environment**
+ - OS: [e.g. GNU+Linux, macOS, Windows]
+ - Emacs version [e.g. 27.2]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+<!--
+NOTE: When talking about scrolling up or down, use the same meaning that Emacs uses in its scroll-up and scroll-down commands. Scrolling up means the text goes up, not the view of the window.
+-->
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,12 @@
+---
+name: Question
+about: Ask a question
+title: ''
+labels: question
+assignees: ''
+
+---
+
+<!--
+NOTE: When talking about scrolling up or down, use the same meaning that Emacs uses in its scroll-up and scroll-down commands. Scrolling up means the text goes up, not the view of the window.
+-->