Make statusbar faster

[AlexKurek]

This does not require an extensive testing, since I havent touched computations. Just look at ncalls and it explains everything. Now printing and checking the terminal size occurs only 5x / sec.
For a 1.5 GB FITS:
before:

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
     5823    0.018    0.000   10.835    0.002 /home/akurek/miniconda3/envs/pybdsf_3_14/lib/python3.14/site-packages/bdsf/statusbar.py:70(increment)
     5841    0.036    0.000   10.809    0.002 /home/akurek/miniconda3/envs/pybdsf_3_14/lib/python3.14/site-packages/bdsf/statusbar.py:46(__print)
     5851    0.023    0.000   10.764    0.002 /home/akurek/miniconda3/envs/pybdsf_3_14/lib/python3.14/site-packages/bdsf/statusbar.py:33(__getsize)

after:

     5823    0.007    0.000    0.208    0.000 /home/akurek/miniconda3/envs/pybdsf_3_14/lib/python3.14/site-packages/bdsf/statusbar.py:79(increment)
       87    0.001    0.000    0.260    0.003 /home/akurek/miniconda3/envs/pybdsf_3_14/lib/python3.14/site-packages/bdsf/statusbar.py:56(__print)
       97    0.001    0.000    0.294    0.003 /home/akurek/miniconda3/envs/pybdsf_3_14/lib/python3.14/site-packages/bdsf/statusbar.py:40(__getsize)

This 3 functions are 52x faster.
The entire run is 2.6% faster.

[gmloose]

I think it's OK to only update every 200 ms. I'm don't completely understand the other changes that I commented on.

[gmloose]

Comment doesn't match with the conditional (self.max != 0). So either the comment or the code is incorrect. Also, it's not completely clear for me why you moved this line from the increment() method into the __print() method.

[AlexKurek]

We want the progress bar to handle terminal resizing at any moment, so the calculation of self.comp must always happen immediately after checking the terminal size.
If/else is there to prevent division by zero error.