[REQUEST] Add expand Parameter to rich.progress.track for Full-Width Progress Bars

[PeiPei233]

Have you checked the issues for a similar suggestions?
I have check the issue/discussion for similar suggestions.

How would you improve Rich?

Currently, the rich.progress.track function does not support the expand parameter. When used alongside other components with expand, it does not look visually consistent or unified. I want to modify the track function to include an expand parameter. When expand=True, it should add expand=True to the internal Progress instance and set the BarColumn's bar_width=None so that it displays in full width. The specific changes are as follows:

--- original progress.py                                                                                                                                      
                                                                                                                                                              
+++ new progress.py                                                                                                                                           
                                                                                                                                                              
@@ -122,6 +122,7 @@                                                                                                                                           
                                                                                                                                                              
     update_period: float = 0.1,                                                                                                                              
     disable: bool = False,                                                                                                                                   
     show_speed: bool = True,                                                                                                                                 
+    expand: bool = False,                                                                                                                                    
 ) -> Iterable[ProgressType]:                                                                                                                                 
     """Track progress by iterating over a sequence.                                                                                                          
                                                                                                                                                              
@@ -156,6 +157,7 @@                                                                                                                                           
                                                                                                                                                              
                 complete_style=complete_style,                                                                                                               
                 finished_style=finished_style,                                                                                                               
                 pulse_style=pulse_style,                                                                                                                     
+                bar_width=None if expand else 40,                                                                                                            
             ),                                                                                                                                               
             TaskProgressColumn(show_speed=show_speed),                                                                                                       
             TimeRemainingColumn(elapsed_when_finished=True),                                                                                                 
@@ -169,6 +171,7 @@                                                                                                                                           
                                                                                                                                                              
         get_time=get_time,                                                                                                                                   
         refresh_per_second=refresh_per_second or 10,                                                                                                         
         disable=disable,                                                                                                                                     
+        expand=expand,                                                                                                                                       
     )                                                                                                                                                        
                                                                                                                                                              
     with progress:   

Before expand:

After expand:

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