Postgresql templates for SelectStatement

Tseesecake should support to translate queries to Postgresql dialect.

To do:

[X] Move existing templates from DuckDB to Common
[X] Handling of upper case in identities (we need to format as identity all column references)
[X] Few differences in the part of Date_Part function
[X] Few differences in the name of window functions (First vs First_Value)
[X] Qualify clause doesn't exist in Postgresql
[x] Having clause not supporting to use a reference to a projection (we need an arranger to fix this ... but not for all dialects)

Seddryck / Tseesecake