[ID-3737] fix: windows pkce cmd errors, protocol name, pkce docs

[nattb8]

Summary

• Fixed command prompt errors when printing logs during PKCE authentication on Windows
• During browser redirection on Windows, the open prompt will display the correct app name without the .cmd extension
• Corrected documentation related to PKCE

Customer Impact

• PKCE flow on Windows now logs cleanly without printing errors to the command prompt window
• Updated Windows default protocol name to use the application name
• Improved documentation makes PKCE setup and usage clearer