[Good First Issue] Add more benchmarks

[Wh1isper]

🚅Description

Benchmarks aim to measure the performance of the library.

• Performance: Processing time, Training time of model, Simpling rate...
• Memory Consumption
• Others, like cache hit rate...

Now we provide a simple benchmark for our CTGAN implementation against the original one. Fit them with a big ramdom dataset, and compare their memory consumptions.
https://github.com/hitsz-ids/synthetic-data-generator/tree/main/benchmarks

🏕Solution(optional)

Add benchmarks for:

• Performance: Processing time, Training time of model, Simpling rate...

🍰Detail(optional)

🍰Example(optional)