Add discussion templates

.github/DISCUSSION_TEMPLATE/general.yml

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+body:
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Pre-submission Checklist
+      description: Please verify the following before submitting your discussion
+      options:
+        - label: I have verified that this discussion would not be more appropriate as an issue in a specific repository
+          required: true
+        - label: I have searched existing discussions to avoid duplicates
+          required: true
+
+  - type: textarea
+    id: topic
+    attributes:
+      label: Discussion Topic
+      description: What would you like to discuss with the MCP community?
+      placeholder: |
+        Please provide a clear description of what you'd like to discuss.
+        Include relevant context and background information.
+    validations:
+      required: true

.github/DISCUSSION_TEMPLATE/ideas.yml

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+body:
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Pre-submission Checklist
+      description: Please verify the following before submitting your idea
+      options:
+        - label: I have verified this would not be more appropriate as a feature request in a specific repository
+          required: true
+        - label: I have searched existing discussions to avoid duplicates
+          required: true
+
+  - type: textarea
+    id: idea
+    attributes:
+      label: Your Idea
+      description: Share your idea for improving MCP
+      placeholder: |
+        Please describe your idea in detail:
+        - What problem does it solve?
+        - Who would benefit from this?
+        - How might it be implemented?
+    validations:
+      required: true
+
+  - type: checkboxes
+    id: scope
+    attributes:
+      label: Scope
+      description: What aspect of MCP does this idea relate to? (Select all that apply)
+      options:
+        - label: Protocol Specification
+        - label: SDK Features
+        - label: Documentation
+        - label: Developer Experience
+        - label: Other

.github/DISCUSSION_TEMPLATE/q-a.yml

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+body:
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Pre-submission Checklist
+      description: Please verify the following before asking your question
+      options:
+        - label: I have checked that this question would not be more appropriate as an issue in a specific repository
+          required: true
+        - label: I have searched existing discussions and documentation for answers
+          required: true
+
+  - type: checkboxes
+    id: category
+    attributes:
+      label: Question Category
+      description: What area is your question about? Select all that apply.
+      options:
+        - label: Protocol Specification
+        - label: SDK Usage
+        - label: Server Implementation
+        - label: General Implementation
+        - label: Documentation
+        - label: Other
+
+  - type: textarea
+    id: question
+    attributes:
+      label: Your Question
+      description: What would you like to know?
+      placeholder: Be specific and include any relevant context or code examples
+    validations:
+      required: true

.github/DISCUSSION_TEMPLATE/show-and-tell.yml

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+body:
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Pre-submission Checklist
+      description: Please verify the following before sharing your work
+      options:
+        - label: I have checked that this content would not be more appropriate in a specific repository
+          required: true
+        - label: This post follows the MCP community guidelines
+          required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: What would you like to share?
+      description: Tell us about what you've built or learned with MCP
+      placeholder: |
+        Share details about:
+        - What you built
+        - How you built it
+        - What challenges you faced
+        - What you learned
+        - Any tips for others
+    validations:
+      required: true
+
+  - type: textarea
+    id: links
+    attributes:
+      label: Relevant Links
+      description: Share any relevant links to your project
+      placeholder: |
+        - GitHub repository
+        - Blog post
+        - Demo
+        - Documentation