Improve relation handling

[rustprooflabs]

Closes https://github.com/rustprooflabs/pgosm-flex/issues/255.

:warning: Potentially breaking change

My intention of this particular view isn't for it to be queried directly, but that doesn't mean someone somewhere isn't. This is the reason for bumping version to 0.6.0 instead of continuing with 0.5.2.

• Rename backend view places_in_relations to place_polygon_in_relations https://github.com/rustprooflabs/pgosm-flex/commit/5a57c5eef03054aaafa285b0d2d6dbc878bfa1ce

New materialized views

New views to be preferred by default over the base table name (w/out v in the name).

• osm.vroad_line
• osm.vroad_polygon
• osm.vroad_major
• osm.vwater_line
• osm.vwater_polygon
• osm.vpublic_transport_line
• osm.vpublic_transport_polygon

New backend views

The materialized views all have related views used. Not listed here, not expected to be primary use views.

[rustprooflabs]

Unit tests pass, Colorado ran successfully.