docs(community): add discussion templates for ideas and Q&A

.github/DISCUSSION_TEMPLATE/idea.yml

@@ -0,0 +1,26 @@
+title: Share an idea
+labels: []
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for helping improve GHOST! For reproducible bugs, use a [bug report](https://github.com/fotedev/ghost/issues/new?template=bug_report.yml) instead. Security issues go to SECURITY.md, never public discussions.
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem or gap
+      description: What are you trying to achieve, and what currently gets in the way?
+    validations:
+      required: true
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed solution
+      description: What would you like GHOST to do? Include alternatives you considered.
+    validations:
+      required: true
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional context
+      description: OS, PowerShell version, the target app and instance, or docs you checked.

.github/DISCUSSION_TEMPLATE/q-a.yml

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+title: Ask a question
+labels: []
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Before asking, please check the [FAQ](https://github.com/fotedev/ghost/blob/main/docs/faq.md) and [Troubleshooting](https://github.com/fotedev/ghost/blob/main/docs/troubleshooting.md) — your answer may already be there. For reproducible bugs, use a [bug report](https://github.com/fotedev/ghost/issues/new?template=bug_report.yml) instead.
+  - type: textarea
+    id: question
+    attributes:
+      label: Your question
+      description: Be specific — include the script or instance involved and what you already tried.
+    validations:
+      required: true
+  - type: textarea
+    id: environment
+    attributes:
+      label: Environment (if relevant)
+      description: Windows or Linux, PowerShell version, Python availability, affected app and instance.