Update issue templates

Author: gonzalezreal

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,38 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+Thank you for contributing to MarkdownUI!
+
+Before you submit an issue, please complete the report with all the relevant details for your bug and go through every item in the checklist.
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Checklist**
+- [ ] I can reproduce this issue with a vanilla SwiftUI project.
+- [ ] I can reproduce this issue using the `main` branch of this package.
+- [ ] This bug hasn't been addressed in an [existing GitHub issue](https://github.com/gonzalezreal/swift-markdown-ui/issues).
+
+**Steps to reproduce**
+Explanation of how to reproduce the incorrect behavior. This could include an attached project, a link to code, or a Markdown-formatted text exhibiting the issue.
+1. ...
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Version information**
+- MarkdownUI: [e.g. 2.0.0, or a commit hash]
+- OS: [e.g. iOS 15, macOS 13]
+- Xcode: [e.g. 14.2.0]
+
+**Additional context**
+Add any other context about the problem here.