Write python module to create input JSON for LFP NWB generation

[danielsf]

Historically, LFP NWB files were created with a LIMS strategy. We do not want to rely on the ruby code, so we will write a python module to query the LIMS database and generate the input JSONs needed for LFP data generation.

• [x] Find historic examples of LFP input JSONs and the ruby strategy that generates them.
• [x] Write python code to run the same database queries and produce the input JSON files.

Can live alongside the input_json writer codes for ecephys sessions in here

https://github.com/AllenInstitute/AllenSDK/tree/master/allensdk/brain_observatory/vbn_2022

[danielsf]

Hacky example code for LFP NWB generation can be found in

/allen/aibs/informatics/danielsf/lfp_nwb

[aamster]

Pulling data files to generate LFP data is complete, which was added to the existing input json creator. Still to do: current source density.