feat: create headless_pkg, combine core and arm headless

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src/headless_pkg/setup.py

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+from setuptools import find_packages, setup
+
+package_name = 'headless_pkg'
+
+setup(
+    name=package_name,
+    version='0.0.0',
+    packages=find_packages(exclude=['test']),
+    data_files=[
+        ('share/ament_index/resource_index/packages',
+            ['resource/' + package_name]),
+        ('share/' + package_name, ['package.xml']),
+    ],
+    install_requires=['setuptools'],
+    zip_safe=True,
+    maintainer='David',
+    maintainer_email='ds0196@uah.edu',
+    description='Headless rover control package to handle command interpretation and embedded interfacing.',
+    license='All Rights Reserved',
+    entry_points={
+        'console_scripts': [
+            "headless = headless_pkg.headless:main",
+        ],
+    },
+)