Draft: V24.07

Closes #144

Merging:

• Add the height attribute to the SpatiaLite database table Building (!141 (merged)).
• Change the insert_building(), import_from_postgis() and get_all_buildings_in_tile() functions to use the new building attribute height (!142 (merged)).
• Change the get_country_buildings_iter() function to use the new building attribute height (!143 (merged)).

\approve @kasra @laurens @gislars

\fyi @tara