Moving lifetime + age to where it is used

Signed-off-by: Daniel <daniel.hutzel@sap.com>

fiori/db/sqlite/index.cds

@@ -0,0 +1,10 @@
+//
+//  Add Author.age and .lifetime with a DB-specific function
+//
+
+using { AdminService } from '@capire/bookshop';
+
+extend projection AdminService.Authors with {
+  strftime('%Y',dateOfDeath)-strftime('%Y',dateOfBirth)              as age: Integer,
+  strftime('%Y',dateOfBirth) || ' – ' || strftime('%Y',dateOfDeath)  as lifetime : String
+}