Create a skeleton python project and modify it to fit this project

Create a skeleton python project using "hatch new -i --cli
infra-rebuild" with Hatch version 1.7.0 and modify it to fit this
project. This is the first step of porting infra-rebuild to Python.

Also provide a first .gitignore ignoring relevant build directories.

src/infra_rebuild/__about__.py

@@ -0,0 +1 @@
+__version__ = "0.0.1"

src/infra_rebuild/__main__.py

@@ -0,0 +1,6 @@
+import sys
+
+if __name__ == "__main__":
+    from infra_rebuild.cli import infra_rebuild
+
+    sys.exit(infra_rebuild())

src/infra_rebuild/cli/__init__.py

@@ -0,0 +1,9 @@
+import click
+
+from infra_rebuild.__about__ import __version__
+
+
+@click.group(context_settings={"help_option_names": ["-h", "--help"]}, invoke_without_command=True)
+@click.version_option(version=__version__, prog_name="infra-rebuild")
+def infra_rebuild():
+    click.echo("Hello world!")