DB Class throws Exception if on init it fails to connect to the DB,
will not throw Exception if failed connection during execution but
will do the normal retry and soft failure run
DB\ArrayIO will throw Exception on missing table array and table name
All Exceptions have a code set
search in an array in any format and returns value of key if found.
Either as set with path to key, or as flat with only values.
Optional possible to prefix with the search keys to group found entries
Remove unused code and classes.
Clean up code to remove all named constant from them and throw
deprecation alerts if used.
Add basic psalm setup in root folder and remove from www folder
