refactor: rename package from mytoolkit to bin

- Move all source files from mytoolkit/ to bin/
- Update entry point and build config in pyproject.toml
- Add pillow and pypdf dependencies
- Update README and .gitignore paths
- Remove unused subprocess import in pdf.py
- Clean up duplicate imports in pdf merge command

bin/cli.py

@@ -0,0 +1,36 @@
+"""MyCLI main entry point."""
+
+import click
+
+from bin.commands import pdf, image, latex, video, bib, utils, env_cmd, ssh_cmd, git_cmd
+from bin.commands.self_mgmt import update_cmd, uninstall_cmd, self_cmd
+
+
+@click.group()
+@click.version_option(version="0.1.0", prog_name="mytoolkit")
+def cli():
+    """Personal CLI toolkit."""
+    pass
+
+
+# Register command groups
+cli.add_command(pdf.pdf)
+cli.add_command(image.image)
+cli.add_command(latex.latex)
+cli.add_command(video.video)
+cli.add_command(bib.bib)
+cli.add_command(utils.utils)
+cli.add_command(env_cmd)
+cli.add_command(ssh_cmd)
+cli.add_command(git_cmd)
+cli.add_command(update_cmd)
+cli.add_command(uninstall_cmd)
+cli.add_command(self_cmd)
+
+
+def main():
+    cli()
+
+
+if __name__ == "__main__":
+    main()