feat: draft for bug-report issue template added.

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -0,0 +1,53 @@
+name: Bug report
+description: Report a bug.
+title: "<insert title>"
+labels: [bug]
+
+body:
+- type: markdown
+  attributes:
+    value: >
+      Thank you for taking the time to file a bug report.
+      Please check that the code is pointing to the HEAD of develop
+      or any commit in master which is tagged with a version number.
+
+- type: textarea
+  attributes:
+    label: "Describe the issue:"
+    description: >
+      Describe the issue and any previous attempt to solve it.
+  validations:
+    required: true
+
+- type: textarea
+  attributes:
+    label: "Code example:"
+    description: >
+      If relevant, show how to reproduce the issue using a minimal working
+      example.
+    placeholder: |
+      << your code here >>
+    render: shell
+  validations:
+    required: false
+
+- type: textarea
+  attributes:
+    label: "Target platform:"
+    description: >
+      Give a description of the target platform (CPU, network, compiler).
+      Please give the full CPU part description, using for example
+      `cat /proc/cpuinfo | grep 'model name' | uniq` (Linux)
+      or `sysctl machdep.cpu.brand_string` (macOS) and the full output
+      the `--version` option of your compiler.
+  validations:
+    required: true
+
+- type: textarea
+  attributes:
+    label: "Configure options:"
+    description: >
+      Please give the exact configure command used and attach
+      `config.log`, `grid.config.summary` and the output of `make V=1`.
+  validations:
+    required: true