✨ Support AST TRIM function

[joocer]

SELECT TRIM('#! ' FROM '    #SQL Tutorial!    ') AS TrimmedString;
    /// TRIM([BOTH | LEADING | TRAILING] <expr> [FROM <expr>])\
    /// Or\
    /// TRIM(<expr>)
    Trim {
        expr: Box<Expr>,
        // ([BOTH | LEADING | TRAILING], <expr>)
        trim_where: Option<(TrimWhereField, Box<Expr>)>,
    },

[joocer]

#370