feat(cli): add initial repository management commands

- Introduce CLI using Typer for repository management
- Add commands for archiving, cleaning, moving, reviewing, and status
- Implement configuration loading and default structure setup
- Include utilities for Git status checks and directory size calculation
- Lay groundwork for extensible repository operations

Signed-off-by: Max P. <Mail@MPassarello.de>

src/repocat/models/config.py

@@ -0,0 +1,20 @@
+from pydantic import BaseModel, Field
+from pathlib import Path
+from typing import List, Optional
+
+class RepoCategory(BaseModel):
+    name: str
+    subdir: str
+    days: Optional[int] = Field(default=None, ge=1)
+    volatile: bool = False
+    description: Optional[str] = None
+    is_archive: bool = False
+
+class RepoCatDefaults(BaseModel):
+    dry_run: bool = True
+    auto_create_directories: bool = True
+
+class RepoCatConfig(BaseModel):
+    base_dir: Path = Field(default=Path("~/Repositories").expanduser())
+    categories: List[RepoCategory]
+    defaults: Optional[RepoCatDefaults] = RepoCatDefaults()