Implement CLI entrypoint (#4)

Implement CLI entrypoint:
* Add lint command

pyproject.toml

@@ -20,6 +20,7 @@ classifiers = [
 
 dependencies = [
     "dbt-core>=1.5",
+    "click>=7.1.1, <9.0.0",
 ]
 requires-python = ">=3.10"
 readme = "README.md"
@@ -47,6 +48,9 @@ docs = [
 [tool.pdm.version]
 source = "scm"
 
+[tool.pdm.scripts]
+dbt-score = {call = "dbt_score.cli:cli"}
+
 ### Mypy ###
 
 [tool.mypy]
@@ -71,6 +75,7 @@ extend-select = [
     "PL", # pylint
     "Q", # flake8-quotes
     "RUF", # ruff
+    "D", # pycodestyle
     "E", # pycodestyle errors
     "W", # pycodestyle warnings
 ]

src/dbt_score/__main__.py

@@ -0,0 +1,9 @@
+"""Entry point of the dbt_score.
+
+This enables module to be run directly.
+"""
+
+from dbt_score.cli import cli
+
+if __name__ == "__main__":
+    cli()

src/dbt_score/cli.py

@@ -0,0 +1,34 @@
+"""CLI interface."""
+
+from typing import Final
+
+import click
+from dbt.cli.options import MultiOption
+
+BANNER: Final[str] = r"""
+          __ __     __
+     ____/ // /_   / /_        _____ _____ ____   _____ ___
+    / __  // __ \ / __/______ / ___// ___// __ \ / ___// _ \
+   / /_/ // /_/ // /_ /_____/(__  )/ /__ / /_/ // /   /  __/
+   \__,_//_.___/ \__/       /____/ \___/ \____//_/    \___/
+    """
+
+
+@click.version_option(message="%(version)s")
+@click.group(help=f"\b{BANNER}", invoke_without_command=False)
+def cli() -> None:
+    """CLI entrypoint."""
+
+
+@cli.command()
+@click.option(
+    "--select",
+    "-s",
+    help="Specify the nodes to include.",
+    cls=MultiOption,
+    type=tuple,
+    multiple=True,
+)
+def lint(select: tuple[str]) -> None:
+    """Lint dbt models metadata."""
+    raise NotImplementedError()