add sharding.xml

sharding-jdbc/sharding-jdbc-orchestration/src/test/resources/yaml/unit/sharding.yaml

+dataSources:
+  ds_0: !!org.apache.commons.dbcp2.BasicDataSource
+    driverClassName: org.h2.Driver
+    url: jdbc:h2:mem:ds_0;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false;MODE=MYSQL
+    username: sa
+    password:
+  ds_1: !!org.apache.commons.dbcp2.BasicDataSource
+    driverClassName: org.h2.Driver
+    url: jdbc:h2:mem:ds_1;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false;MODE=MYSQL
+    username: sa
+    password:
+    
+shardingRule:
+  tables:
+    t_order:
+      actualDataNodes: ds_${0..1}.t_order_${0..1}
+      databaseStrategy:
+        inline:
+          shardingColumn: user_id
+          algorithmExpression: t_order_${user_id % 2}
+      tableStrategy:
+        inline:
+          shardingColumn: order_id
+          algorithmExpression: t_order_${order_id % 2}
+      keyGenerator:
+        column: order_id
+    t_order_item:
+      actualDataNodes: ds_${0..1}.t_order_item_${0..1}
+      tableStrategy:
+        inline:
+          shardingColumn: order_id
+          algorithmExpression: t_order_item_${order_id % 2}
+      keyGenerator:
+        column: order_item_id
+  bindingTables:
+    - t_order,t_order_item
+  defaultDataSourceName: ds_1
+  defaultDatabaseStrategy:
+    inline:
+      shardingColumn: user_id
+      algorithmExpression: ds_${user_id % 2}
+  defaultTableStrategy:
+    none:
+  defaultKeyGenerator:
+    type: SNOWFLAKE
+props:
+  sql.show: false
\ No newline at end of file