feat: support hover provider feat #194
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功能
支持
HoverProvider的开发描述
在我们dt-sql-parser内部，
CommonEntityContext实体被收集的时候，区分了是新建还是使用，如果是新建的情况下，会从当前CREATE语句中捞到columns挂在当前实体上，而我们当前功能就是当用户使用通过SQL新建出来的表时，使用表的地方hover到表名上方，可以展示出对应的字段列表，字段列表里包含字段名以及字段类型。preview
https://cythia828.github.io/monaco-sql-languages/
自测
demo
CREATE TABLE postgresql.public.employees ( emp_id BIGINT COMMENT 'sfsf', name VARCHAR, department VARCHAR ) WITH ( connector = 'postgresql', connection_url = 'jdbc:postgresql://localhost:5432/company', connection_user = 'user', connection_password = 'password' ); select emp_id from postgresql.public.employees as tb1 select id from "postgresql.public.employees" select name from 'postgresql.public.employees' select name frompostgresql.public.employees``