Add example rich dependency; refactor example script

Author: reznakt

devcontainer_python/__main__.py

@@ -1,12 +1,47 @@
 #!/usr/bin/env python3
 
+from rich.console import Console
+from rich.panel import Panel
+from rich.text import Text
+
 from . import PACKAGE_NAME, PACKAGE_VERSION
-from .utils import square
 
 
 def main() -> None:
-    print(f"Hello from {PACKAGE_NAME} version {PACKAGE_VERSION}!")
-    print("3 squared is:", square(3))
+    console = Console()
+
+    welcome_message = Text.from_markup(
+        f":tada: Hello from [bold cyan]{PACKAGE_NAME}[/bold cyan] version"
+        f" [green]{PACKAGE_VERSION}[/green]! :sparkles:",
+        justify="center",
+    )
+
+    console.print(
+        Panel(
+            welcome_message,
+            title="[bold]Welcome[/bold]",
+            border_style="blue",
+            padding=(1, 2),
+        )
+    )
+
+    console.print()
+
+    warning_message = (
+        ":bell: [bold]Don't forget to customize this template![/bold] :bell:"
+        "\n\n"
+        "Make sure to update project details and other metadata in the "
+        "project configuration files (e.g., [bold]pyproject.toml[/bold])."
+    )
+
+    console.print(
+        Panel(
+            Text.from_markup(warning_message, justify="center"),
+            title="[bold yellow]Important Reminder[/bold yellow]",
+            border_style="yellow",
+            padding=(1, 2),
+        )
+    )
 
 
 if __name__ == "__main__":

devcontainer_python/utils.py

@@ -11,7 +11,7 @@ license = "MIT"
 readme = "README.md"
 dynamic = ["version", "classifiers"]
 requires-python = ">=3.10,<4.0"
-dependencies = []
+dependencies = ["rich (>=14.1.0,<15.0.0)"]
 
 [project.urls]
 "GitHub" = "https://github.com/reznakt/devcontainer-python"