### What problem were solved in this pull request?
Problem:
parse_defs中的一些变量命名不是很清晰

### What is changed and how it works?
重命名，增加SqlNode后缀，希望看起来更清晰，知道这些变量的意图
另外，增加了一个visual studio code的生成parser的任务

### What problem were solved in this pull request?

Issue Number: close #142 

Problem:
value和tuple_cell的语义是重合的，所以代码时冗余的

### What is changed and how it works?
删除tuple_cell，都使用value来替换，并将tuple_cell中的接口都在value中实现

### Other information

### What problem were solved in this pull request?

Issue Number: close #192 

Problem:
clang 14编译失败

### What is changed and how it works?
修复编译错误

### Other information

logical plan & physical plan;
explain;
yacc rewrite;
join operator(nested loop join);
simple rewrite rules;
fix some issues of mysql protocol;

format lex file