Extend WvcLib for library binding

[lmangani]

Implements and exports a new function wvlet_compile_query to compile wvlet query and return the SQL as a string. The binding has been tested working with an experimental native DuckDB Extension on linux/x86

D CREATE TABLE t1 AS SELECT 42 AS i, 84 AS j;
D SELECT * FROM wvlet('from t1');
-- wvlet version=0.0.0+1-e9ceb08b+20241123-2203, src=01JDDN09HBS0DEYDCPRZGYNTKC.wv:1
select * from t1
┌───────┬───────┐
│   i   │   j   │
│ int32 │ int32 │
├───────┼───────┤
│    42 │    84 │
└───────┴───────┘

Note the mandatory debug print from WvcMain.scala is still present. It would be nice to add an option to disable it.

I never used Scala before, apologies shall this humble PR be improperly implemented 🤞 ready to learn if that's the case

Potential self-fix for #498