podio-merge-files: add progress bar

[meleneemil]

Follow-up from enhancement I suggested:
#900

Example output with this version

#lxplus952 tools master >> ./podio-merge-files --output-file test.root /eos/home-s/sfranche/FCC/samples/bib/ipc/jaeyserm_Z_4IP_29may24_FCCee_Z256_2
T_grids8/ALLEGRO_29may24_FCCee_Z256_2T_grids8/ALLEGRO_o1_v03_99*
Checked input files for duplicates in 0.00 seconds
Initialized reader and writer in 2.97 seconds
Merging: 

 Merging category '      runs': ................................................... 50...............
 Merging category '      meta': ................................................... 50...............
 Merging category '    events': ................................................... 50...............
Merged data categories in 25.74 seconds
Retrieved metadata frames in 1.32 seconds
Wrote metadata frames in 0.14 seconds

BEGINRELEASENOTES

• podio-merge-files: add progress bar and time measurement per step; add short option for output files argument
  ENDRELEASENOTES

[tmadlener]

Nice addition. I would go for tqdm in this case, as that handles all of the progress bar stuff and timing and we would not have to do that ourselves.

It has the downside of adding another run-time dependency, but I think that is OK.

[meleneemil]

tqdm added. Looking ok, assuming no error printouts

#lxplus969 tools master >> ./podio-merge-files --output-file test.root /eos/home-s/sfranche/FCC/samples/bib/ipc/jaeyserm_Z_4IP_29may24_FCCee_Z256_2T
_grids8/ALLEGRO_29may24_FCCee_Z256_2T_grids8/ALLEGRO_o1_v03_99*
Checked input files for duplicates in 0.00 seconds
Initialized reader and writer in 2.86 seconds
Merging: 
Merging category 'runs'
100%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████| 66/66 [00:03<00:00, 20.71it/s]
Merging category 'meta'
100%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████| 66/66 [00:00<00:00, 87.76it/s]
Merging category 'events'
100%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████| 66/66 [00:17<00:00,  3.70it/s]

Merged data categories in 25.64 seconds
Retrieved metadata frames in 1.30 seconds
Wrote metadata frames in 0.14 seconds

[m-fila]

Nice, could you also add tqdm to requirements.txt and mention in README under prerequisites for tools (next to graphivz and tabulate)

[tmadlener]

Very nice, thanks a lot. I have a few comments below. There are probably still some formatting issues, which are easily fixed by simply running pre-commit run -a black (inside a Key4hep environment).