feat: move project from poetry to pdm, rewrite from scratch and add

basic `notebooks`, `edit` and `show` commands

halig/commands/show.py

@@ -0,0 +1,34 @@
+from pathlib import Path
+
+from rich.console import Console
+from rich.markdown import Markdown
+
+from halig.commands.base import BaseCommand
+from halig.encryption import Encryptor
+from halig.settings import Settings
+
+
+class ShowCommand(BaseCommand):
+    def __init__(self, note_path: Path, settings: Settings):
+        super().__init__(settings)
+
+        self.note_path = self.settings.notebooks_root_path / note_path
+        self.encryptor = Encryptor(self.settings)
+        self.console = Console()
+        if self.note_path.is_dir():
+            self.note_path /= f"{self.today.date()}.age"
+
+        if not self.note_path.exists():
+            err = f"File {self.note_path.name} does not exist"
+            raise ValueError(err)
+
+        if not self.note_path.name.endswith(".age"):
+            err = f"File {self.note_path.name} is not a valid AGE file"
+            raise ValueError(err)
+
+    def run(self):
+        with self.note_path.open("rb") as f:
+            data = f.read()
+        contents = self.encryptor.decrypt(data)
+        md_contents = Markdown(contents.decode())
+        self.console.print(md_contents)