feat: 实现物质查询，调整项目结构

app/services/matters.py

@@ -1,11 +1,18 @@
 import json
 
 def readMatterList() -> dict:
-    with open("matters/list.json", "r", encoding="utf8") as f:
+    with open("resources/matters/list.json", "r", encoding="utf8") as f:
         text = f.read()
         result = json.loads(text)
     
     return result
 
 def readMatter(id: str):
-    return readMatterList().get(id, -1)
+    path = readMatterList().get(id, -1)
+    if (path == -1):
+        return {"message": f"No Matter {id}"}
+    with open(f"resources/matters/{path}.json", "r", encoding="utf8") as f:
+        text = f.read()
+        result = json.loads(text)
+        
+    return {"message": "OK", "content": result}