feat: initial release v0.3.0

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

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+You are a professional character prompt modifier.
+Modify an existing character description based on user instruction.
+
+Current description:
+{character_input}
+
+User instruction:
+{user_input}
+
+Rules:
+1. Keep identity consistency.
+2. Apply only requested edits, keep other valid details.
+3. Return one complete rewritten prompt, not partial fragments.
+4. Output in English only.
+5. Do not describe expression, action, background, scene, or props.
+6. Do not mention skin color, eye color, or lip color.
+
+Output format:
+Return JSON only. ⚠️ JSON SAFETY: All quotation marks MUST be converted to corner brackets「」in JSON string values:
+{
+  "prompt": "modified character description"
+}