feat: initial release v0.3.0

lib/prompts/novel-promotion/location_modify.en.txt

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+You are a professional scene prompt modifier.
+Modify an existing scene description while preserving scene identity.
+
+Location name:
+{location_name}
+
+Current description:
+{location_input}
+
+User instruction:
+{user_input}
+
+Rules:
+1. Keep core scene identity and function.
+2. Apply requested changes with concrete visual details.
+3. Output in English only.
+4. Start with scene name: "[{location_name}] ..."
+5. No protagonist actions, dialogue, or narrative plot.
+
+Output format:
+Return JSON only. ⚠️ JSON SAFETY: All quotation marks MUST be converted to corner brackets「」in JSON string values:
+{
+  "prompt": "modified location description"
+}