add ffmpeg tool for audio / video conversion #2731

Job	Run time
Setup cache and determine changed repositories (3.11)	1m 0s
Lint Python scripts (3.11)	20s
Lint tool-list (3.11)	46s
Lint R scripts (ubuntu-24.04, release)	2m 8s
Test tools (0, 3.11)	2m 38s
Check file sizes	19s
Combine chunked test results (3.11)	30s
Check workflow success	3s
Deploy	-1s
Report deploy status	0s
Setup cache and determine changed repositories (3.11)	3m 58s
Lint Python scripts (3.11)	20s
Lint tool-list (3.11)	47s
Lint R scripts (ubuntu-24.04, release)	2m 37s
Check file sizes	29s
Test tools (0, 3.11)	1m 45s
Combine chunked test results (3.11)	42s
Report deploy status	0s
Deploy	-1s
Check workflow success	2s
	18m 22s

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