add token count at status bar in real-time

[Artenx]

Displaying the real-time token count of the current conversation in the TUI status bar, this helps users check if they are approaching the model context limit.

[Hmbown]

@Marten2016 let me see what I can do about this with the deepseek api - thank you!

[LIYUE1918]

#1756

[LIYUE1918]

#1753