internal: refactor for packaging

Package using python-build, python-installer and hatch

src/caelestia/subcommands/scheme.py

@@ -0,0 +1,11 @@
+from argparse import Namespace
+
+
+class Command:
+    args: Namespace
+
+    def __init__(self, args: Namespace) -> None:
+        self.args = args
+
+    def run(self) -> None:
+        pass