Add GitHub issue templates

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: "🐛 Bug report"
+description: "Report a bug or regression."
+title: "[Bug]: "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to report a bug!
+  - type: input
+    id: version
+    attributes:
+      label: Version
+      description: "What version/build are you using?"
+      placeholder: "e.g. 1.2.3 or commit SHA"
+    validations:
+      required: true
+  - type: dropdown
+    id: platform
+    attributes:
+      label: Platform
+      description: "Where are you running it?"
+      multiple: true
+      options:
+        - Windows
+        - macOS
+        - Linux
+        - Other
+    validations:
+      required: true
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to reproduce
+      description: "List the steps to reproduce the issue."
+      placeholder: |
+        1. Go to ...
+        2. Click ...
+        3. Observe ...
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      description: "What did you expect to happen?"
+    validations:
+      required: true
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual behavior
+      description: "What actually happened?"
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs / screenshots
+      description: "Paste any relevant logs or screenshots."
+      render: shell
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: "Documentation"
+    url: "https://github.com"
+    about: "Check documentation or existing resources before filing an issue."

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: "✨ Feature request"
+description: "Suggest an idea or enhancement."
+title: "[Feature]: "
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for suggesting an improvement!
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem statement
+      description: "What problem are you trying to solve?"
+      placeholder: "I'm always frustrated when..."
+    validations:
+      required: true
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed solution
+      description: "What would you like to see?"
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+      description: "Any alternative solutions or features you've considered."
+    validations:
+      required: false
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional context
+      description: "Add any other context or screenshots."
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/task.yml

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+name: "🧹 Maintenance task"
+description: "Track upkeep, refactors, or internal tasks."
+title: "[Task]: "
+labels: ["maintenance"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Use this template for internal maintenance work.
+  - type: textarea
+    id: summary
+    attributes:
+      label: Summary
+      description: "Describe the task and goal."
+    validations:
+      required: true
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Checklist
+      options:
+        - label: Define acceptance criteria
+        - label: Identify impacted modules
+        - label: Add/adjust tests if needed
+  - type: textarea
+    id: notes
+    attributes:
+      label: Notes
+      description: "Links, references, or additional details."
+    validations:
+      required: false