add disclaimer for generated files #915

Job	Run time
Test sse2 code on Linux (gcc)	56s
Test install with generated cython files	45s
Test installation using newest version of Taskflow	27s
Test installation using system supplied libs	25s
Python 3.9	2m 1s
Python 3.9	2m 59s
Python 3.9	2m 26s
Python 3.10	2m 2s
Python 3.10	3m 41s
Python 3.10	2m 38s
Python 3.11	2m 11s
Python 3.11	4m 21s
Python 3.11	2m 24s
Python 3.12	2m 16s
Python 3.12	3m 12s
Python 3.12	4m 8s
Python 3.13	2m 34s
Python 3.13	5m 26s
Python 3.13	2m 43s
	47m 35s

Provide feedback