add sharding-databases.yaml

sharding-jdbc-example/encrypt-example/encrypt-raw-jdbc-example/src/main/resources/META-INF/sharding-databases.yaml

+dataSources:
+  ds_0: !!com.zaxxer.hikari.HikariDataSource
+    driverClassName: com.mysql.jdbc.Driver
+    jdbcUrl: jdbc:mysql://localhost:3306/demo_ds_0?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=UTF-8
+    username: root
+    password:
+  ds_1: !!com.zaxxer.hikari.HikariDataSource
+    driverClassName: com.mysql.jdbc.Driver
+    jdbcUrl: jdbc:mysql://localhost:3306/demo_ds_1?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=UTF-8
+    username: root
+    password:
+
+shardingRule:
+  broadcastTables:
+    - t_country
+
+props:
+  sql.show: false