Added module which does OCR for PDF, pdf-ocr in a separate package (#324)

(has a lot of dependencies).  Uses Tesseract.

trustgraph-ocr/setup.py

@@ -0,0 +1,47 @@
+import setuptools
+import os
+import importlib
+
+with open("README.md", "r") as fh:
+    long_description = fh.read()
+
+# Load a version number module
+spec = importlib.util.spec_from_file_location(
+    'version', 'trustgraph/ocr_version.py'
+)
+version_module = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(version_module)
+
+version = version_module.__version__
+
+setuptools.setup(
+    name="trustgraph-ocr",
+    version=version,
+    author="trustgraph.ai",
+    author_email="security@trustgraph.ai",
+    description="TrustGraph provides a means to run a pipeline of flexible AI processing components in a flexible means to achieve a processing pipeline.",
+    long_description=long_description,
+    long_description_content_type="text/markdown",
+    url="https://github.com/trustgraph-ai/trustgraph",
+    packages=setuptools.find_namespace_packages(
+        where='./',
+    ),
+    classifiers=[ 
+        "Programming Language :: Python :: 3",
+        "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+        "Operating System :: OS Independent",
+    ],
+    python_requires='>=3.8',
+    download_url = "https://github.com/trustgraph-ai/trustgraph/archive/refs/tags/v" + version + ".tar.gz",
+    install_requires=[
+        "trustgraph-base>=0.21,<0.22",
+        "pulsar-client",
+        "prometheus-client",
+        "boto3",
+        "pdf2image",
+        "pytesseract",
+    ],
+    scripts=[
+        "scripts/pdf-ocr",
+    ]
+)