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

Dockerfile_only_txt

@@ -0,0 +1,42 @@
+FROM python:3.11-alpine
+
+# https://docs.docker.com/engine/reference/builder/
+
+# For debugging
+# docker run --rm -v "$(pwd)":/files:ro extract_otp_secrets_only_txt
+# docker build . -t extract_otp_secrets_only_txt -f Dockerfile_only_txt --pull --build-arg RUN_TESTS=false
+# docker run --entrypoint /bin/sh -it --rm -v "$(pwd)":/files:ro extract_otp_secrets_only_txt
+# docker run --entrypoint /extract/run_pytest.sh --rm -v "$(pwd)":/files:ro extract_otp_secrets_only_txt tests/extract_otp_secrets_test.py -k "not qreader" --relaxed -vvv -s
+
+WORKDIR /extract
+
+COPY . .
+
+ARG RUN_TESTS=true
+
+RUN apk add --no-cache \
+        jpeg \
+        zlib \
+    && echo "Arch: $(apk --print-arch)" \
+    && if [[ "$(apk --print-arch)" == "aarch64" ]]; then apk add --no-cache --virtual .build-deps \
+        gcc \
+        jpeg-dev \
+        libc-dev \
+        py3-setuptools \
+        python3-dev \
+        zlib-dev \
+    ; fi \
+    && pip install --no-cache-dir -U \
+        colorama \
+        Pillow \
+        protobuf \
+        qrcode \
+    && if [[ "$(apk --print-arch)" == "aarch64" ]]; then apk del .build-deps; fi \
+    && if [[ "$RUN_TESTS" == "true" ]]; then /extract/run_pytest.sh tests/extract_otp_secrets_test.py -k "not qreader" --relaxed; else echo "Not running tests..."; fi
+
+WORKDIR /files
+
+ENTRYPOINT ["python", "/extract/src/extract_otp_secrets.py"]
+
+LABEL org.opencontainers.image.source https://github.com/scito/extract_otp_secrets
+LABEL org.opencontainers.image.license GPL-3.0+