fix: Fix import sorting in template files

- Fix import order in CLI template to comply with Ruff's isort rules
- Fix import formatting in test template files
- Ensure generated projects pass ruff check and format --check
- Remove extra blank lines that caused import sorting violations

Author: s-celles

{{cookiecutter.project_slug}}/src/{{cookiecutter.project_slug.replace('-', '_')}}/cli.py

@@ -1,15 +1,14 @@
 {%- if cookiecutter.command_line_interface != "none" %}
 """Command line interface for {{ cookiecutter.project_name }}."""
-
 {%- if cookiecutter.command_line_interface == "typer" %}
+
 from typing import Annotated
 
 import typer
 
 from . import __version__
 from .core import hello_world
 
-
 app = typer.Typer(
     name="{{ cookiecutter.project_slug }}",
     help="{{ cookiecutter.project_short_description }}",

{{cookiecutter.project_slug}}/tests/test_cli.py

@@ -1,11 +1,11 @@
 """Tests for CLI functionality."""
 {%- if cookiecutter.use_pytest == "y" and cookiecutter.command_line_interface != "none" %}
 {%- if cookiecutter.command_line_interface == "typer" %}
+
 from typer.testing import CliRunner
 
 from {{ cookiecutter.project_slug.replace('-', '_') }}.cli import app
 
-
 runner = CliRunner()