convert import styles to themepark

Introduces presets which avoid much of the previous configuration
duplication. The original import files are now thin wrappers around
the themepark themes.

lib-lua/themes/nominatim/topics/full.lua

@@ -0,0 +1,32 @@
+local _, flex, cfg = ...
+
+local group
+if cfg.with_extratags then
+    group = 'extra'
+else
+    group = 'delete'
+end
+
+flex.set_main_tags('all_boundaries')
+flex.modify_main_tags('natural')
+flex.modify_main_tags('street/' .. (cfg.street_theme or 'default'))
+flex.modify_main_tags('poi/' .. group)
+
+flex.set_name_tags('core')
+flex.modify_name_tags('address')
+flex.modify_name_tags('poi')
+
+flex.set_address_tags('core')
+flex.modify_address_tags('houses')
+
+flex.ignore_keys('metatags')
+flex.add_for_extratags('required')
+
+if cfg.with_extratags then
+    flex.set_unused_handling{delete_keys = {'tiger:*'}}
+    flex.add_for_extratags('name')
+    flex.add_for_extratags('address')
+else
+    flex.ignore_keys('name')
+    flex.ignore_keys('address')
+end