feature: refactor api parse to g4 (#365)

* feature: refactor api parse to g4

* new g4 parser

* add CHANGE_LOG.MD

* refactor

* fix byte bug

* refactor

* optimized

* optimized

* revert

* update readme.md

* update readme.md

* update readme.md

* update readme.md

* remove no need

* fix java gen

* add upgrade

* resolve confilits

Co-authored-by: anqiansong <anqiansong@xiaoheiban.cn>

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/ClickHouse/clickhouse-go v1.4.3
 	github.com/DATA-DOG/go-sqlmock v1.4.1
 	github.com/alicebob/miniredis/v2 v2.14.1
+	github.com/antlr/antlr4 v0.0.0-20210105212045-464bcbc32de2
 	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
 	github.com/dchest/siphash v1.2.1
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible