capture QR codes from camera and major refactoring

- add GUI for QR code capturing from camera (CV2 is used)
- support different QR readers: ZBAR,QREADER,QREADER_DEEP,CV2,CV2_WECHAT
- support several input files
- add option to ignore duplicate otps
- write warnings and errors to stderr
- add output coloring
- rename project from extract_otp_secret_keys to extract_otp_secrets
- improve help
- clean verbose level output
- use Python type hints and check with mypy
- use f-strings
- clean up code
- add more tests
- calculate code coverage
- use src-layout: move files and folders
- support wheel packing
- enhance README.md
- bugfixes
    * fix -k -
    * fix utf-8 encoding on windows

setup.py

@@ -1,62 +1,5 @@
-import pathlib
+#!/usr/bin/python3
 from setuptools import setup
 
-setup(
-    name='extract_otp_secret_keys',
-    version='1.6.0',
-    description='Extract two-factor authentication (2FA, TFA, OTP) secret keys from export QR codes of "Google Authenticator" app',
-
-    long_description=(pathlib.Path(__file__).parent / 'README.md').read_text(),
-    long_description_content_type='text/markdown',
-
-    url='https://github.com/scito/extract_otp_secret_keys',
-    author='scito',
-    author_email='info@scito.ch',
-
-    classifiers=[
-        'Development Status :: 5 - Production/Stable',
-
-        'Environment :: Console',
-        'Topic :: System :: Archiving :: Backup',
-        'Topic :: Utilities',
-
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: 3.9',
-        'Programming Language :: Python :: 3.10',
-        'Programming Language :: Python :: 3.11',
-
-        'Intended Audience :: End Users/Desktop',
-        'Intended Audience :: Developers',
-        'Intended Audience :: System Administrators',
-
-        'Programming Language :: Python'
-        'Natural Language :: English',
-        'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
-    ],
-
-    keywords='python security json otp csv protobuf qrcode two-factor totp google-authenticator recovery proto3 mfa two-factor-authentication tfa qr-codes otpauth 2fa security-tools',
-
-    py_modules=['extract_otp_secret_keys', 'protobuf_generated_python.google_auth_pb2'],
-    entry_points={
-        'console_scripts': [
-            'extract_otp_secret_keys = extract_otp_secret_keys:sys_main',
-        ]
-    },
-
-    python_requires='>=3.7, <4',
-    install_requires=[
-        'protobuf',
-        'qrcode',
-        'Pillow',
-        'qreader',
-        'opencv-python'
-    ],
-
-    project_urls={
-        'Bug Reports': 'https://github.com/scito/extract_otp_secret_keys/issues',
-        'Source': 'https://github.com/scito/extract_otp_secret_keys',
-    },
-
-    license='GNU General Public License v3 (GPLv3)',
-)
+#  compatibility with legacy builds or versions of tools that don’t support certain packaging standards
+setup()