cli: use recognizable main functions

src/cli/main.py

@@ -1,8 +1,8 @@
 import argparse
 from pathlib import Path
 
-from .print import pretty_print_marker_data
-from .validate import validate_marker_data
+from .print import main as pretty_print_marker_data
+from .validate import main as validate_marker_data
 
 from mapcrafter_exporter import generate_mapcrafter_output
 from bluemap_exporter import generate_bluemap_output

src/cli/print.py

@@ -2,7 +2,7 @@ from lib_marker import MarkerSet, Marker, Point, Track, Area
 from marker_sets import WORLDS
 
 
-def pretty_print_marker_data() -> None:
+def main() -> None:
     tree = format_tree(
         "Worlds", [format_world(name, world) for name, world in WORLDS.items()]
     )

src/cli/validate.py

@@ -2,7 +2,7 @@ from marker_sets import WORLDS
 from lib_marker import Point, Track
 
 
-def validate_marker_data() -> None:
+def main() -> None:
     for test_name, test_f in _tests.items():
         results = test_f()
         if len(results) > 0: