Add argument --not-check-update and get_stats_display now width default terminal size 80

[fox0]

No description provided.

[fox0]

Now UI:

[INFO] To stop the proxy, press Ctrl+C twice
══════════════════════════════════ STATISTICS ══════════════════════════════════
Conns   : Unblock: 20     | Miss: 35        | Total: 64       | Errors: 9       
Traffic : DL: 3.0 MB      | UL: 219.1 KB    | Total: 3.2 MB   | 
Speed   : DL: 0 b/s       | UL: 0 b/s       | AVG DL: 719 Kb/s| AVG UL: 56 Kb/s 
════════════════════════════════════════════════════════════════════════════════

[GVCoder09]

Sorry, but I cannot accept your PR for the following reasons:

• The line os.system("") enables ASCII characters in the Windows console;
• You are making changes to the UI that don't align with my vision for the program;
• Adding parameters to hide updates and the banner only complicates the program's logic. Showing updates doesn't degrade the user experience in any way, and it supports the development of the project. Displaying the disclaimer protects me from legal risks. Both can be disabled with the -q parameter.