Initial library structure

dclient/__main__.py

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+from .cli import cli
+
+if __name__ == "__main__":
+    cli()

dclient/cli.py

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+import click
+
+
+@click.group()
+@click.version_option()
+def cli():
+    "A client CLI utility for Datasette instances"
+
+
+@cli.command(name="command")
+@click.argument(
+    "example"
+)
+@click.option(
+    "-o",
+    "--option",
+    help="An example option",
+)
+def first_command(example, option):
+    "Command description goes here"
+    click.echo("Here is some output")