Prepare reports for Promptkit migration

internal/promptassets/assets/prompts/daily/daily_generated_text.yml

@@ -0,0 +1,23 @@
+id: weather.daily_generated_text
+version: "1.0.0"
+default_profile: gemini-flash-latest
+description: Daily weather report analysis prompt.
+inputs:
+  - name: data_package
+    required: true
+    content_type: application/yaml
+    description: Structured weather data package
+messages:
+  - role: system
+    content_file: ../common/system.md
+  - role: user
+    content_file: ../common/data_package.user.md
+  - role: user
+    content: |
+      {{input "data_package"}}
+  - role: user
+    content_file: ./daily_generated_text.user.md
+output:
+  format: json
+  validation_mode: json_schema
+  schema_path: daily.generated_text.schema.json