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

.github/workflows/ci_docker.yml

@@ -9,7 +9,6 @@ name: docker
 on:
   # run it on push to the default repository branch
   push:
-    branches: [master]
   schedule:
     # Run weekly on default branch
     - cron: '47 3 * * 6'

README.md

@@ -1,4 +1,4 @@
-# Extract secrets from QR codes exported by two-factor authentication apps
+# Extract TOTP/HOTP secrets from QR codes exported by two-factor authentication apps
 
 [![CI tests](https://github.com/scito/extract_otp_secrets/actions/workflows/ci.yml/badge.svg)](https://github.com/scito/extract_otp_secrets/actions/workflows/ci.yml)
 ![coverage](https://img.shields.io/badge/coverage-96%25-brightgreen)
@@ -13,15 +13,15 @@
 ---
 
 The Python script `extract_otp_secrets.py` extracts one time password (OTP) secrets from QR codes exported by two-factor authentication (2FA) apps such as "Google Authenticator".
-The export QR codes from authentication apps can be provided in three ways to this script:
+The exported QR codes from authentication apps can be read in three ways:
 
-1. Capture from the system camera in a GUI,
-2. Image files containing the QR codes, and
-3. Text files containing the QR code data generated by QR readers.
+1. Capture from the system camera using a GUI, _(new!)_
+2. Read image files containing the QR codes, and _(new!)_
+3. Read text files containing the QR code data generated by third-party QR readers.
 
 The secret and otp values can be exported to json or csv files, as well as printed or saved to PNG images.
 
-This script/project was renamed from extract_otp_secret_keys to extract_otp_secrets in version 2.0.0.
+**The project and the script were renamed from extract_otp_secret_keys to extract_otp_secrets in version 2.0.0.**
 
 ## Installation