Consider pros and cons of moving generic sql to hakunapi-sql to enable other db implementations

[nls-jajuko]

hakunapi-source-gpkg ( #74) and hakunapi-source-oracle (initial version with bbox filter ) could benefit from shared hakunapi-sql

draft of hakunapi-source-oracle including these proposed changes

• https://github.com/nls-jajuko/hakunapi/tree/source-oracle/src/hakunapi-source-oracle/src/main/java/fi/nls/hakunapi/simple/sdo

[nls-jajuko]

Let's reconsider when there are more different SQL source implementations. Closing for now