indents(sql): initial support (#4857)

* indents(sql): initial support

* indents(sql): fix queries and lua style

queries/sql/indents.scm

@@ -0,0 +1,27 @@
+[
+ (select)
+ (cte)
+ (column_definitions)
+ (case)
+ (subquery)
+ (insert)
+] @indent.begin
+
+
+(compound_statement
+  (keyword_begin)
+) @indent.begin
+
+(column_definitions ")" @indent.branch)
+
+(subquery ")" @indent.branch)
+
+(cte ")" @indent.branch)
+
+[
+ (keyword_end)
+ (keyword_values)
+ (keyword_into)
+] @indent.branch
+
+(keyword_end) @indent.end