refactor: The first refactored version for sdk release (#907)

Co-authored-by: chengfangyin2 <chengfangyin3@jd.com>

dbgpt/storage/schema.py

@@ -0,0 +1,44 @@
+from enum import Enum
+import os
+
+
+class DbInfo:
+    def __init__(self, name, is_file_db: bool = False):
+        self.name = name
+        self.is_file_db = is_file_db
+
+
+class DBType(Enum):
+    Mysql = DbInfo("mysql")
+    OCeanBase = DbInfo("oceanbase")
+    DuckDb = DbInfo("duckdb", True)
+    SQLite = DbInfo("sqlite", True)
+    Oracle = DbInfo("oracle")
+    MSSQL = DbInfo("mssql")
+    Postgresql = DbInfo("postgresql")
+    Clickhouse = DbInfo("clickhouse")
+    StarRocks = DbInfo("starrocks")
+    Spark = DbInfo("spark", True)
+    Doris = DbInfo("doris")
+
+    def value(self):
+        return self._value_.name
+
+    def is_file_db(self):
+        return self._value_.is_file_db
+
+    @staticmethod
+    def of_db_type(db_type: str):
+        for item in DBType:
+            if item.value() == db_type:
+                return item
+        return None
+
+    @staticmethod
+    def parse_file_db_name_from_path(db_type: str, local_db_path: str):
+        """Parse out the database name of the embedded database from the file path"""
+        base_name = os.path.basename(local_db_path)
+        db_name = os.path.splitext(base_name)[0]
+        if "." in db_name:
+            db_name = os.path.splitext(db_name)[0]
+        return db_type + "_" + db_name