chore: improve issue and PR templates with industry best practices (#1088)

Bug report template:
- Add OS, Node.js version, shell, and install method fields
- Add all 6 supported runtimes (+ Multiple option)
- Add frequency and severity/impact dropdowns
- Add config.json, STATE.md, and settings.json retrieval instructions
- Add PII warnings on every field that could leak sensitive data
- Recommend presidio-anonymizer and scrub for log anonymization
- Add diagnostic commands for debugging install issues
- Add mandatory PII review checklist checkbox

Feature request template:
- Add scope dropdown (core workflow, planning, context, runtime, etc.)
- Add runtime multi-select checkboxes

New templates:
- Documentation issue template (incorrect, missing, unclear, outdated)
- config.yml to disable blank issues and link Discord/Discussions

PR template:
- Add linked issue reference (Closes #)
- Add How section for approach description
- Add runtime testing checklist (all 5 runtimes + N/A)
- Add template/reference update check
- Add test pass check
- Add screenshots/recordings section

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -6,21 +6,56 @@ body:
   - type: markdown
     attributes:
       value: |
-        Thanks for suggesting a feature\! Please describe what you would like to see.
+        Thanks for suggesting a feature! Please describe what you'd like to see.
+
   - type: textarea
     id: problem
     attributes:
       label: Problem or motivation
       description: What problem does this solve? Why do you want this?
+      placeholder: "I'm frustrated when..."
     validations:
       required: true
+
   - type: textarea
     id: solution
     attributes:
       label: Proposed solution
-      description: How do you think this should work?
+      description: How do you think this should work? Include example commands or workflows if possible.
+      placeholder: |
+        A new command `/gsd:example` that...
     validations:
       required: true
+
+  - type: dropdown
+    id: scope
+    attributes:
+      label: Which area does this affect?
+      options:
+        - Core workflow (init, plan, build, verify)
+        - Planning system (phases, roadmap, state)
+        - Context management (context engineering, summaries)
+        - Runtime integration (hooks, statusline, settings)
+        - Installation / setup
+        - Documentation
+        - Other
+    validations:
+      required: true
+
+  - type: checkboxes
+    id: runtimes
+    attributes:
+      label: Applicable runtimes
+      description: Which runtimes should this work with?
+      options:
+        - label: Claude Code
+        - label: Gemini CLI
+        - label: OpenCode
+        - label: Codex
+        - label: Copilot
+        - label: Antigravity
+        - label: All runtimes
+
   - type: textarea
     id: alternatives
     attributes:
@@ -28,10 +63,11 @@ body:
       description: Have you considered other approaches?
     validations:
       required: false
+
   - type: textarea
     id: context
     attributes:
       label: Additional context
-      description: Any other information, screenshots, or examples
+      description: Any other information, screenshots, or examples.
     validations:
       required: false