[ADD] Add TTFT, TPOT metrics in tqdm bars.

[mumupika]

• [ADD] Add TTFT, TPOT metrics.
• [FIX] remove unnecessary dependencies.
• [FIX] replace 'is False' to 'not'.
• [FIX] modified some prompts.
• [FIX] trailing blanks.
• [Fix] redundant variables.

TTFT is the "Time To First Token" metric, and TPOT is the "Time Per Output Token" metric. It will be seen as follows.