Add issue template for containerization (#102)

Matches templates made in container here
https://github.com/apple/container/pull/152.

Points questions to the container Discussions.

Signed-off-by: Kathryn Baldauf <k_baldauf@apple.com>

.github/ISSUE_TEMPLATE/01-bug.yml

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+name: Bug Report
+description: File a bug report.
+title: "[Bug]: "
+labels: ["bug", "triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: checkboxes
+    id: prereqs
+    attributes:
+      label: I have done the following
+      description: Select that you have completed the following prerequisites. 
+      options:
+        - label: I have searched the existing issues
+          required: true
+        - label: If possible, I've reproduced the issue using the 'main' branch of this project
+          required: false
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Steps to reproduce
+      description: Explain how to reproduce the incorrect behavior. 
+    validations:
+      required: true
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: Current behavior
+      description: A concise description of what you're experiencing.
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected Behavior
+      description: A concise description of what you expected to happen.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Environment 
+      description: |
+        examples: 
+          - **OS**: MacOS 26 Beta 1
+          - **swift**: Apple Swift version 6.2
+          - **xcode**: Xcode 26 Beta 17A5241e
+      value: |
+        - OS: 
+        - swift: 
+        - xcode: 
+      render: markdown
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant log output
+      description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
+      render: shell
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Code of Conduct
+      description: By submitting this issue, you agree to follow our [Code of Conduct](https://github.com/apple/containerization/blob/main/CONTRIBUTING.md#code-of-conduct). 
+      options:
+        - label: I agree to follow this project's Code of Conduct
+          required: true

.github/ISSUE_TEMPLATE/02-feature.yml

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+name: Feature or Enhancement request
+description: File a request for a feature or enhancement
+title: "[Request]: "
+labels: ["feature", "triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for contributing to the container project!
+  - type: textarea
+    id: request
+    attributes:
+      label: Feature or enhancement request details
+      description: Describe your proposed feature or enhancement. Code samples that show what's missing, or what new capabilities will be possible, are very helpful! Provide links to existing issues or external references/discussions, if appropriate.
+    validations:
+      required: true
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Code of Conduct
+      description: By submitting this issue, you agree to follow our [Code of Conduct](https://github.com/apple/containerization/blob/main/CONTRIBUTING.md#code-of-conduct). 
+      options:
+        - label: I agree to follow this project's Code of Conduct
+          required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: containerization community support
+    url: https://github.com/apple/container/discussions
+    about: Please ask and answer questions here.