Show version number in CLI (when asked)

Author: dannyadair

src/pdfbaker/__init__.py

@@ -0,0 +1,5 @@
+"""pdfbaker - Create PDF documents from YAML-configured SVG templates."""
+
+from importlib.metadata import version
+
+__version__ = version("pdfbaker")

src/pdfbaker/__main__.py

@@ -6,6 +6,7 @@
 
 import click
 
+from pdfbaker import __version__
 from pdfbaker.baker import PDFBaker
 from pdfbaker.errors import PDFBakeError
 
@@ -14,6 +15,7 @@
 
 
 @click.group()
+@click.version_option(version=__version__, prog_name="pdfbaker")
 def cli() -> None:
     """Generate PDF documents from YAML-configured SVG templates."""