refactor: update naming convention

Updates naming convention to pubkycore throughout project.
Updated bindings accordingly.
Added python bindings.

bindings/python/setup.py

@@ -0,0 +1,23 @@
+from setuptools import setup, find_packages
+
+setup(
+    name="pubkycore",
+    version="0.1.0",
+    packages=find_packages(),
+    package_data={
+        "pubkycore": ["*.so", "*.dylib", "*.dll"],
+    },
+    install_requires=[],
+    author="Pubky",
+    author_email="",
+    description="Python bindings for the Pubky Mobile SDK",
+    long_description=open("README.md").read(),
+    long_description_content_type="text/markdown",
+    url="",
+    classifiers=[
+        "Programming Language :: Python :: 3",
+        "License :: OSI Approved :: MIT License",
+        "Operating System :: OS Independent",
+    ],
+    python_requires=">=3.6",
+)