Suggestions: Add custom database type support, Add HTTP data source support, Upgrade rich text components

[hzhufa]

1、PROPOSE: The types of database drivers supported by Alibaba Druid connection pool are limited. How to support more JDBC drivers, such as calcite and avatica custom drivers? At present, I am in the "JdbcDataSource.java" to determine if the URL contains“ jdbc:avatica " or "jdbc:calcite" Set the dataType to "mysql" to make the Alibaba Druid connection pool think it is mysql. 2、PROPOSE: Add HTTP type data source. Some analysis data need to be calculated through the interface of other business systems. 3、PROPOSE: Rich text analysis component in widget is upgraded to support HTML. 4、BUG: The field list in "View" does not display icons in some database, because the field type is "VARCHAR NOT NULL", which is not "VARCHAR". 5、BUG: The field list in "View" is not displayed in some database, because the catalog of some database metadata is empty. It is recommended to set the default value "default" if the catalog is empty.