feat: add bug and task issue templates

.github/ISSUE_TEMPLATE/bug.yaml

@@ -0,0 +1,62 @@
+name: Bug
+description: Report a bug
+body:
+
+- type: checkboxes
+  attributes:
+  label: Checklist
+  description: Confirm the following items before proceeding. If one cannot be satisfied, create a discussion thread instead.
+  required: true - label: I've searched other issues and no duplicate issues were found.
+  required: true - label: I'm convinced that this is not my fault but a bug.
+  required: true
+
+- type: textarea
+  attributes:
+  label: Description
+  description: Write a brief description of the bug.
+  validations:
+  required: true
+
+- type: textarea
+  attributes:
+  label: Expected behavior
+  description: Describe the expected behavior.
+  validations:
+  required: true
+
+- type: textarea
+  attributes:
+  label: Actual behavior
+  description: Describe the actual behavior.
+  validations:
+  required: true
+
+- type: textarea
+  attributes:
+  label: Steps to reproduce
+  description: Write the steps to reproduce the bug.
+  placeholder: |- 1. 2. 3.
+  validations:
+  required: true
+
+- type: textarea
+  attributes:
+  label: Versions
+  description: Provide the version information. You can omit this if you believe it's irrelevant.
+  placeholder: |- - OS: - ROS 2:
+  validations:
+  required: false
+
+- type: textarea
+  attributes:
+  label: Possible causes
+  description: Write the possible causes if you have any ideas.
+  validations:
+  required: false
+
+- type: textarea
+  attributes:
+  label: Additional context
+  description: Add any other additional context if it exists.
+  validations:
+  required: false

.github/ISSUE_TEMPLATE/task.yaml

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+name: Task
+description: Plan a task
+body:
+
+- type: checkboxes
+  attributes:
+  label: Checklist
+  description: Confirm the following items before proceeding. If one cannot be satisfied, create a discussion thread instead.
+  required: true - label: I've searched other issues and no duplicate issues were found.
+  required: true - label: I've agreed with the maintainers that I can plan this task.
+  required: true
+
+- type: textarea
+  attributes:
+  label: Description
+  description: Write a brief description of the task.
+  validations:
+  required: true
+
+- type: textarea
+  attributes:
+  label: Purpose
+  description: Describe the purpose of the task.
+  validations:
+  required: true
+
+- type: textarea
+  attributes:
+  label: Possible approaches
+  description: Describe possible approaches for the task.
+  validations:
+  required: true
+
+- type: textarea
+  attributes:
+  label: Definition of done
+  description: Write the definition of done for the task.
+  validations:
+  required: true