add issue template

.github/workflows/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,45 @@
+name: Bug Report
+description: File a bug report
+title: "[Bug]: "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: input
+    id: PyBaMM-version
+    attributes:
+      label: PyBaMM Version
+      description: What version of PyBaMM are you running?
+      placeholder: PyBaMM version
+    validations:
+      required: true
+  - type: input
+    id: python-version
+    attributes:
+      label: Python Version
+      description: What version of python are you running?
+      placeholder: python version
+    validations:
+      required: true
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: Describe the bug
+      description: A clear and concise description of what the bug is.
+    validations:
+      required: true
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Steps to Reproduce
+      description: Tell us how to reproduce this behaviour. Ideally, this should take the form of a [Minimum Workable Example](https://stackoverflow.com/help/minimal-reproducible-example)
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant log output
+      description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
+      render: shell