Add issue templates

.github/ISSUE_TEMPLATE/bug.yml

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+name: Bug
+description: Report an issue with the library
+title: 'Bug: <title>'
+labels:
+  - bug
+assignees:
+  - OptimumCode
+body:
+  - type: checkboxes
+    attributes:
+      label: Is there an existing issue for this?
+      description: Please search to see if an issue already exists for the bug you encountered.
+      options:
+        - label: I have searched the existing issues
+          required: true
+  - type: textarea
+    attributes:
+      label: Current Behavior
+      description: A concise description of what you're experiencing.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Expected Behavior
+      description: A concise description of what you expected to happen.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: JSON schema
+      description: A JSON schema that results in the observed behavior
+      placeholder: |
+        {}
+      render: json
+    validations:
+      required: false
+  - type: input
+    attributes:
+      label: Library version
+      description: Version of the library that you used when experienced the problem
+      placeholder: '0.0.1'
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Anything else?
+      description: |
+        Links? References? Anything that will give us more context about the issue you are encountering!
+
+        Tip: You can attach images or log files by clicking this area to highlight it and then dragging files in.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Enhancement proposal for the library
+title: 'Enhancement: <title>'
+labels:
+  - enhancement
+assignees:
+  - OptimumCode
+body:
+  - type: checkboxes
+    attributes:
+      label: Is there an existing issue for this?
+      description: Please search to see if a similar proposal already exists.
+      options:
+        - label: I have searched the existing issues
+          required: true
+  - type: textarea
+    attributes:
+      label: Enhancement description
+      description: A description of what would like to add/change in the library.
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/question.yml

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+name: Question
+description: Ask a question about the library or about its behavior in certain cases
+title: 'Question: <title>'
+labels:
+  - question
+assignees:
+  - OptimumCode
+body:
+  - type: checkboxes
+    attributes:
+      label: Is there an existing issue for this?
+      description: Please search to see if a similar question already exists for the one you would like to ask.
+      options:
+        - label: I have searched the existing issues
+          required: true
+  - type: textarea
+    attributes:
+      label: Question
+      description: What would you like to know?
+    validations:
+      required: false
+  - type: input
+    attributes:
+      label: Library version
+      description: Version of the library that you use right now
+      placeholder: '0.0.1'
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Anything else?
+      description: |
+        Links? References? Examples? Anything else that will help to properly respond to your question!
+
+        Tip: You can attach images or log files by clicking this area to highlight it and then dragging files in.
+    validations:
+      required: false