use json for region map sections

  - update nlohmann/json and pantor/inja in tools/
  - create new inja template

Author: garakmon

json_data_rules.mk

@@ -6,3 +6,9 @@ $(DATA_SRC_SUBDIR)/wild_encounters.h: $(DATA_SRC_SUBDIR)/wild_encounters.json $(
 	$(JSONPROC) $^ $@
 
 $(C_BUILDDIR)/wild_encounter.o: c_dep += $(DATA_SRC_SUBDIR)/wild_encounters.h
+
+AUTO_GEN_TARGETS += $(DATA_SRC_SUBDIR)/region_map/region_map_entries.h
+$(DATA_SRC_SUBDIR)/region_map/region_map_entries.h: $(DATA_SRC_SUBDIR)/region_map/region_map_sections.json $(DATA_SRC_SUBDIR)/region_map/region_map_sections.json.txt
+	$(JSONPROC) $^ $@
+
+$(C_BUILDDIR)/region_map.o: c_dep += $(DATA_SRC_SUBDIR)/region_map/region_map_entries.h