Slightly better logging experience.

[ghyatzo]

While testing for the previous PRs, I got a bit annoyed by the repeated spam of the same message at every status update.

This PR changes the logging to print a new message only when the status actually changes, adds a timestamp and a
simple indicator of progress.
An example of complete output is:

┌ Info: 14:32:11 - CDS request                                    
│   dataset = "reanalysis-era5-pressure-levels-monthly-means"     
└   status = "accepted"                                           
┌ Info: 14:32:18 - CDS request
│   dataset = "reanalysis-era5-pressure-levels-monthly-means"     
└   status = "successful"                                         
┌ Info: Downloading
│   source = "https://object-store.os-api.cci2.ecmwf.int:443/cci2-prod-cache/1c5003f9dc140530e360d2824bcca486.grib"
│   dest = "C:\\Users\\User\\Dev\\+Julia\\CDSAPI.jl\\test\\data\\era5.grib"
│   progress = 1.0                                                
│   time_taken = "0.27 s"                                         
│   time_remaining = "0.0 s"                                      
│   average_speed = "7.417 MiB/s"                                 
│   downloaded = "1.980 MiB"                                      
│   remaining = "0 bytes"                                         
└   total = "1.980 MiB"        

While in between updates an example output is:

┌ Info: 14:32:11 - CDS request                                    
│   dataset = "reanalysis-era5-pressure-levels-monthly-means"     
└   status = "accepted"
...... # adds a `.` every wait interval

[juliohm]

Please make sure you are using portable methods to erase the terminal. The REPL module doesn't provide a function for that?

[ghyatzo]

It's portable on most modern terminals, not supported on terminals like windows cmd.exe.
This is kind of a gimmick anyway. So it's probably better to just remove it.