Pretty print SQL

[DavidGregory084]

This is a POC to see what the output would look like. Samples from the tests:

with subquery as (
    select 1 as a, sum(cast(2 as integer)) as b,
        (3 + 4) as c,
        row_number() over (order by 13, 14 desc) as rownum
    from one
    inner join two
    on ((5 = 6) and (7 <> 8))
    where ((9 = 10) and (11 <> 12))
)
select a, b, c
from subquery
where rownum between 241 and 256

update one
set col1 = 'a', col2 = 'b'
where (('c' = 'd') and ('e' = 'f'))

select one.col1 as one_col1,
    one.col2 as one_col2,
    two.col2 as two_col2,
    two.col3 as two_col3,
    three.col3 as three_col3,
    three.col4 as three_col4
from one
inner join two
on (one.col2 = two.col2)
inner join three
on (two.col3 = three.col3)

select
    case
        when (mytable.col1 = 1) then 2
        when (mytable.col2 = 2) then 3
    end as case
from mytable

select mytable.col1 as mytable_col1,
    mytable.col2 as mytable_col2
from mytable
where not exists (
    select mytable_col1, mytable_col2
    from (
        select mytable.col1 as mytable_col1,
            mytable.col2 as mytable_col2
        from mytable
    ) as subselect2
)

insert into one (col1, col2, col1, col2, col1,
    col2)
values ('a', 'b', 'a', 'b', 'a', 'b'),
       ('c', 'd', 'c', 'd', 'c', 'd'),
       ('e', 'f', 'e', 'f', 'e', 'f'),
       ('g', 'h', 'g', 'h', 'g', 'h')

I'm not sure how comfortable I am with these changes being in the StatementBuilder itself, but couldn't find a self-contained SQL formatting lib or ANTLR grammar that supports ANSI SQL syntax.

[codecov-io]

Codecov Report

Merging #78 into master will increase coverage by 1.68%.
The diff coverage is 95.94%.

@@            Coverage Diff             @@
##           master      #78      +/-   ##
==========================================
+ Coverage   81.69%   83.37%   +1.68%     
==========================================
  Files          43       43              
  Lines        1147     1281     +134     
  Branches      105      120      +15     
==========================================
+ Hits          937     1068     +131     
- Misses        210      213       +3

Impacted Files	Coverage Δ
...scala/sqlest/sql/base/DeleteStatementBuilder.scala	100% <100%> (ø)	✅
.../main/scala/sqlest/sql/base/StatementBuilder.scala	95.45% <100%> (+6.56%)	✅
...src/main/scala/sqlest/sql/H2StatementBuilder.scala	100% <100%> (ø)	✅
...scala/sqlest/sql/base/UpdateStatementBuilder.scala	100% <100%> (ø)	✅
...rc/main/scala/sqlest/sql/DB2StatementBuilder.scala	85.89% <100%> (+4.86%)	✅
...scala/sqlest/sql/base/InsertStatementBuilder.scala	100% <100%> (ø)	✅
...lest/src/main/scala/sqlest/executor/Database.scala	65.03% <60%> (-0.46%)	❌
...scala/sqlest/sql/base/SelectStatementBuilder.scala	94.84% <92%> (-2.17%)	❌
...n/scala/sqlest/sql/base/BaseStatementBuilder.scala	94.11% <96.47%> (+3.2%)	✅

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