Added initial content for D&D session recap pipeline

prompts/dnd/session_recap.yml

@@ -0,0 +1,22 @@
+id: dnd.session_recap
+version: "1.0.0"
+default_profile: openrouter-gemini-flash
+description: Example D&D session recap prompt definition for experimentation.
+inputs:
+  - name: transcript
+    required: true
+    content_type: application/json
+    description: Structured recap source transcript
+  - name: glossary
+    required: false
+    content_type: text/yaml
+    description: Optional glossary context
+messages:
+  - role: system
+    content_file: ./session_recap.system.md
+  - role: user
+    content_file: ./session_recap.user.md
+output:
+  format: markdown
+  validation_mode: basic
+  repair_attempts: 0