- do not set in/outFIFODepths attrs to 0 after setting
- do not set in/outFIFODepths attrs to max() in InsertFIFO
- special handling of first/last FIFO depths for characterization

cnv has unrelated bug for now

Fixes for automatically generated documentation

Predecessor handling refactor and identity fallback

Hotfix: Updating code to use correct numpy types

Hotfix: delete numpy.str in datapacking

Update requirements

Update GHA to use Ubuntu 20.04

Pure C++ Verilator-based FIFO sizing

[Tests] Fix ipstitch test for VitisBuild

Hotfix/end2end tests