feat: load editable prompts from markdown

tests/test_agent_tools.py

@@ -11,6 +11,7 @@ from llm_trade_bot.config import (
     BraveConfig,
     BybitConfig,
     DeepSeekConfig,
+    PromptsConfig,
     RiskConfig,
     ScannerConfig,
     ScheduleConfig,
@@ -51,6 +52,7 @@ def make_config(database_path: Path) -> AppConfig:
         BybitConfig("key", "secret"),
         TelegramConfig(1, "hash", "token", frozenset({1})),
         BraveConfig("key"),
+        PromptsConfig(database_path.parent / "prompts.md"),
         ScheduleConfig(ZoneInfo("Europe/Warsaw"), (time(9), time(21))),
         ScannerConfig(),
         RiskConfig(),