feat: Support accessing array items and fields of composite types through json operators

This is supported in select=, in filters and in order=.

Resolves #1543

Resolves #2075

Signed-off-by: Wolfgang Walther <walther@technowledgy.de>

test/spec/fixtures/data.sql

@@ -730,3 +730,9 @@ INSERT INTO test.clientinfo (id,clientid, other) values (1,1,'123 Main St'),(2,2
 
 TRUNCATE TABLE test.chores CASCADE;
 INSERT INTO test.chores (id, name, done) values (1, 'take out the garbage', true), (2, 'do the laundry', false), (3, 'wash the dishes', null);
+
+TRUNCATE TABLE test.fav_numbers CASCADE;
+INSERT INTO test.fav_numbers VALUES (ROW(0.5, 0.5), 'A'),  (ROW(0.6, 0.6), 'B');
+
+TRUNCATE TABLE test.arrays CASCADE;
+INSERT INTO test.arrays VALUES (0, '{1,2,3}', '{{1,2,3},{4,5,6},{7,8,9}}'), (1, '{11,12,13}', '{{11,12,13},{14,15,16},{17,18,19}}');