Add initial cwl workflow and cwl tool description

Initial full version of the workflow (without CI/CD) that works in CEP4 environment (MVP). Currently requires both .h5 and .raw files to be defined in the test .json file. However, TMSS returns only the list of .h5 files in its pipeline parset, so workflow would need to be updated to create the input list of .raw files for digitize based on a given list of .h5 files.

docker/Dockerfile

+FROM ubuntu:24.04
+
+#
+# Lightweight container with minimum to run digitize3.py
+#
+ENV INSTALL_DIR=/usr/local
+
+RUN export DEBIAN_FRONTEND=noninteractive && \
+    apt-get -y update && apt-get -y upgrade && \
+    apt-get install -y  python-is-python3 && \
+    apt-get autoremove --purge && \
+#    apt-get install -y wget python3 python3-pip python3-numpy git vim \
+#        python3-pkgconfig libhdf5-dev hdf5-tools python3-setuptools cython3 && \
+    apt-get install -y wget python3 python3-numpy git vim \
+        libhdf5-dev hdf5-tools python3-h5py cwltool && \
+    rm -rf /var/lib/apt/lists/*
+
+# Install cwltool and toil
+#RUN python3 -m pip install cwltool toil[cwl]
+
+#RUN cd ${INSTALL_DIR} && wget https://files.pythonhosted.org/packages/cc/0c/5c2b0a88158682aeafb10c1c2b735df5bc31f165bfe192f2ee9f2a23b5f1/h5py-3.12.1.tar.gz && \
+#    tar xvfz h5py-3.12.1.tar.gz && cd h5py-3.12.1 && python setup.py install --prefix=${INSTALL_DIR}
+	
+#RUN cd ${INSTALL_DIR} && mkdir -p src && cd src/ && git clone https://git.astron.nl/RD/pulp2-cwl && \
+#    cd pulp2-cwl/scripts && cp digitize3.py ${INSTALL_DIR}/bin
+COPY ./scripts/digitize3.py ${INSTALL_DIR}/bin
+
+RUN digitize3.py -h