Add a Gooey-specific issue template

.github/ISSUE_TEMPLATE/issue_template.yml

@@ -0,0 +1,56 @@
+name: Gooey issue
+
+# For documentation concerning the Github form schema see
+# https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/syntax-for-githubs-form-schema
+
+description: Gooey issue
+
+body:
+  - type: textarea
+    attributes:
+      label: What is the problem?
+      description: "Please summarize the issue briefly. Add screenshots if they 
+      help to illustrate it, or copy-paste error messages"
+      placeholder: "Example: The App is unresponsive when I click on Help"
+
+  - type: textarea
+    attributes:
+      label: What steps will reproduce the problem?
+      description: "How do you trigger this bug? Please walk us through it step
+       by step."
+      placeholder: "Example: Open the App from the Desktop shortcut. Select 
+      Documents as the root folder. Click the Help Tab. Boom"
+      value: |
+        1.
+        2. 
+        3.
+        ...
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: "Is there anything else that would be useful to know in this 
+      context? Please also copy-paste relevant output from the Command log, 
+      Error log, or the background Terminal."
+
+  - type: checkboxes
+    id: installer
+    attributes:
+      label: How did you install the App?
+      options:
+        - label: Via the Windows installer
+        - label: Using pip (``pip install datalad-gooey``)
+        - label: Using brew (``brew install datalad-gooey``)
+        - label: Using conda (``conda install -c forge datalad-gooey``)
+        - label: Not sure
+        - label: Other
+
+  - type: textarea
+    attributes:
+      label: System information
+      description: |
+        Please tell us more about your system, including operating system and
+        software versions. The more information we get, the better. You can
+        copy-paste this information from 'Help' -> 'Diagnostic infos'