Add issue templates.

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,42 @@
+name: Bug report
+description: Report a problem with row.
+labels: ['bug']
+body:
+  - type: textarea
+    attributes:
+      label: Description
+      description: Describe the problem.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Steps to reproduce
+      description: |
+        What specific commands do you execute to trigger the problem?
+      placeholder: |
+        row show status
+        ...
+      render: shell
+  - type: textarea
+    attributes:
+      label: Input files
+      description: Attach any input files needed to execute the above steps.
+  - type: textarea
+    attributes:
+      label: Output
+      description: |
+        What output did you get?
+      render: shell
+  - type: textarea
+    attributes:
+      label: Expected output
+      description: What output do you expect?
+  - type: input
+    attributes:
+      label: Row version
+      description: What version of **row** are you using?
+      placeholder: 0.1.0
+  - type: markdown
+    attributes:
+      value: |
+        Execute `row --version` to find your **row** version.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: true
+contact_links:
+  - name: Row discussion board
+    url: https://github.com/glotzerlab/row/discussions/
+    about: Ask the Row user community for help.
+  - name: Row documentation
+    url: https://row.readthedocs.io/
+    about: User documentation.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,25 @@
+name: Feature request
+description: Suggest a new **row** feature
+labels: ['enhancement']
+body:
+  - type: textarea
+    attributes:
+      label: Description
+      description: What new capability would you like in **row**?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Proposed solution
+      description: How should this capability be implemented? What might user interface look like?
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: What additional information is helpful to understand this request?
+  - type: markdown
+    attributes:
+      value: |
+        We would welcome your contribution!
+
+        If you plan to implement this functionality, the **row** developers will discuss the
+        proposed design and API with you **before** you begin work.

.github/ISSUE_TEMPLATE/task.yml

@@ -0,0 +1,16 @@
+name: Task
+description: A task that needs to be completed
+labels: ['task']
+body:
+  - type: textarea
+    attributes:
+      label: Description
+      description: What needs to be done?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Motivation and context
+      description: What additional information is helpful to understand this task?
+    validations:
+      required: true

DESIGN.md

@@ -294,7 +294,6 @@ status may take a long time, so it should display a progress bar.
   without applying the additional submission filters.
 - **workspace**: The location on the file system that contains **directories**.
 
-# TODO: Issue templates?
 # TODO: Dependabot configuration
 # TODO: readthedocs builds
 # TODO: logo