add issue template

Author: abetomo

.github/ISSUE_TEMPLATE/1-bug-report.yaml

@@ -0,0 +1,11 @@
+name: Bug Report
+description: File a bug report.
+type: Bug
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the problem you got
+      description: It's better that you provide information as much as possible.
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/2-feature-request.yaml

@@ -0,0 +1,11 @@
+name: Feature Request
+description: Request a feature.
+type: Feature
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the feature you want
+      description: It's better that you also provide your use case.
+    validations:
+      required: true