feat: add issue templates

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report
+description: Report something that's broken
+title: "[Bug]: "
+labels: ["bug"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: What happened?
+      description: Be specific. Include error messages if any.
+    validations:
+      required: true
+
+  - type: textarea
+    id: repro
+    attributes:
+      label: Steps to reproduce
+      description: Minimal steps to trigger the bug.
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      description: What should have happened instead?
+      placeholder: "I expected zot to..."
+    validations:
+      required: true
+
+  - type: input
+    id: version
+    attributes:
+      label: Version
+      description: "e.g. 0.0.1 — run `zot --version` to check"
+    validations:
+      required: true
+
+  - type: dropdown
+    id: os
+    attributes:
+      label: Operating system
+      options:
+        - macOS
+        - Linux
+        - Windows
+        - Other
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs / screenshots
+      description: |
+        If applicable, paste relevant terminal output or attach screenshots.
+      render: shell
+
+  - type: checkboxes
+    id: checks
+    attributes:
+      label: Before submitting
+      options:
+        - label: I searched existing issues and didn't find a duplicate
+          required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Suggest a new feature or improvement
+title: "[Feature]: "
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for the idea! A short conversation here saves everyone time before any code is written.
+
+        Zot is intentionally focused — not every idea will make it in. A "no" is not a judgment of the idea.
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: What problem does this solve?
+      description: |
+        The **why**, not the **what**. What were you trying to do when you wished this existed?
+      placeholder: "When I'm working with multiple providers, I want to switch between them without restarting zot."
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed solution
+      description: How would you imagine using this? UX sketch, CLI flags, behavior, anything that helps us picture it.
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+      description: What workarounds have you tried? What other tools handle this well?
+      placeholder: "I tried X, but it doesn't solve Y because..."
+
+  - type: dropdown
+    id: contribution
+    attributes:
+      label: Are you willing to contribute the implementation?
+      options:
+        - "Yes, with guidance"
+        - "Yes, I can do it"
+        - "No, just suggesting"
+    validations:
+      required: true
+
+  - type: checkboxes
+    id: checks
+    attributes:
+      label: Before submitting
+      options:
+        - label: I searched existing issues and didn't find a duplicate
+          required: true