Add issue templates, PR template, enable discussions

- Bug report template with diagnostics bundle prompt
- Feature request template with component picker
- Device compatibility report template for community testing
- PR template with quirk traceability checklist
- Enable GitHub Discussions for community support
- Disable wiki (docs site replaces it)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: copyleftdev

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,52 @@
+name: Bug Report
+description: Something isn't working as expected
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for reporting. Please include a diagnostics bundle if possible:
+        ```bash
+        facecam-probe diagnostics --format json > diag.json
+        ```
+  - type: textarea
+    id: description
+    attributes:
+      label: What happened?
+      placeholder: Describe the issue
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: What did you expect?
+      placeholder: Expected behavior
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Steps to reproduce
+      placeholder: |
+        1. Run `facecam-visual --resolution 720`
+        2. Press W for zebras
+        3. ...
+  - type: input
+    id: ubuntu-version
+    attributes:
+      label: Ubuntu version
+      placeholder: "25.10"
+  - type: input
+    id: kernel
+    attributes:
+      label: Kernel version
+      placeholder: "6.17.0-20-generic"
+  - type: input
+    id: firmware
+    attributes:
+      label: Facecam firmware
+      placeholder: "4.09 (from facecam-probe detect)"
+  - type: textarea
+    id: diagnostics
+    attributes:
+      label: Diagnostics bundle
+      description: Paste output of `facecam-probe diagnostics --format json`
+      render: json

.github/ISSUE_TEMPLATE/device_report.yml

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+name: Device Compatibility Report
+description: Report how the Facecam behaves on your system
+labels: ["device-report"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Help us build the compatibility matrix. Run the harness and share results:
+        ```bash
+        facecam-harness --json full > harness.json
+        facecam-probe detect --format json > detect.json
+        ```
+  - type: input
+    id: ubuntu-version
+    attributes:
+      label: Ubuntu version
+      placeholder: "25.10"
+    validations:
+      required: true
+  - type: input
+    id: kernel
+    attributes:
+      label: Kernel version
+      placeholder: "6.17.0-20-generic"
+    validations:
+      required: true
+  - type: input
+    id: firmware
+    attributes:
+      label: Facecam firmware version
+      placeholder: "4.09"
+    validations:
+      required: true
+  - type: dropdown
+    id: usb-connection
+    attributes:
+      label: USB connection type
+      options:
+        - Direct to motherboard (USB-A 3.0)
+        - Direct to motherboard (USB-C)
+        - USB hub
+        - Thunderbolt dock
+        - Other
+  - type: textarea
+    id: probe-output
+    attributes:
+      label: facecam-probe detect output
+      render: text
+  - type: textarea
+    id: harness-output
+    attributes:
+      label: facecam-harness full output
+      render: json
+  - type: textarea
+    id: notes
+    attributes:
+      label: Additional notes
+      placeholder: Any quirks, workarounds, or observations

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature Request
+description: Suggest a new feature or improvement
+labels: ["enhancement"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: What would you like?
+      placeholder: Describe the feature
+    validations:
+      required: true
+  - type: textarea
+    id: use-case
+    attributes:
+      label: Use case
+      placeholder: Why is this useful? What problem does it solve?
+  - type: dropdown
+    id: component
+    attributes:
+      label: Component
+      options:
+        - facecam-probe
+        - facecam-daemon
+        - facecam-ctl
+        - facecam-harness
+        - facecam-visual
+        - System integration (udev/systemd)
+        - Documentation
+        - Other

.github/PULL_REQUEST_TEMPLATE.md

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+## Summary
+
+<!-- What does this PR do? Link to any related issues. -->
+
+## Changes
+
+<!-- Bullet list of what changed and why. -->
+
+-
+
+## Test plan
+
+<!-- How did you verify this works? -->
+
+- [ ] `cargo fmt --all -- --check`
+- [ ] `cargo clippy --workspace -- -D warnings`
+- [ ] `cargo test --workspace`
+- [ ] Tested with physical Facecam (if applicable)
+
+## Quirk traceability
+
+<!-- If this adds a workaround, link the observed behavior that motivates it. -->