Compile RNAscope data and export summary

[lahuuki]

Now that there are multiple versions of the RNAscope data, from different settings on HALO, a more automatic way to build then summarize HALO_all would be useful. Building of this script 01_explore_data.R

Preliminary ideas:

• An input file listing what files to use (like the SPEAQeasy manifest files) for each sample
• save halo_all with a version number
• export a csv with cell type proportions + proportion and counts barplots

[lahuuki]

We have a final version of the HALO data and estimated cell type proportions