feat: Bump version to v0.2.73 and update documentation

This commit updates the version number to v0.2.73 and makes corresponding changes in the README.md and Dockerfile.

Docker file install the default mode, this resolve many of installation issues.

Additionally, the installation instructions are updated to include support for different modes. Setup.py doesn't have anymore dependancy on Spacy.

The change log is also updated to reflect these changes.

Supporting websites need with-head browser.

setup.py

@@ -18,15 +18,9 @@ default_requirements = [req for req in requirements if not req.startswith(("torc
 torch_requirements = [req for req in requirements if req.startswith(("torch", "nltk", "spacy", "scikit-learn", "numpy"))]
 transformer_requirements = [req for req in requirements if req.startswith(("transformers", "tokenizers", "onnxruntime"))]
 
-class CustomInstallCommand(install):
-    """Customized setuptools install command to install spacy without dependencies."""
-    def run(self):
-        install.run(self)
-        subprocess.check_call([os.sys.executable, '-m', 'pip', 'install', 'spacy', '--no-deps'])
-
 setup(
     name="Crawl4AI",
-    version="0.2.72",
+    version="0.2.73",
     description="🔥🕷️ Crawl4AI: Open-source LLM Friendly Web Crawler & Scrapper",
     long_description=open("README.md").read(),
     long_description_content_type="text/markdown",
@@ -41,9 +35,6 @@ setup(
         "transformer": transformer_requirements,
         "all": requirements,
     },
-    cmdclass={
-        'install': CustomInstallCommand,
-    },
     entry_points={
         'console_scripts': [
             'crawl4ai-download-models=crawl4ai.model_loader:main',