[docs] add a diagram illustrating tensorrt-llm and tensorrt

[lastweek]

The image can be found at: https://docs.google.com/presentation/d/1BHGVqv1v1VI0LvLUh1v-vL0eCJCqiYLRfg27ByVmwao/edit#slide=id.g29cce3990fb_0_128

[lastweek]

Hi i'm a newcomer to the source code and found the code quite challenging to understand. I tried to draw a diagram describing the relationship between tensorrt-llm and tensorrt. Note that the image might lack crucial info or even express wrong info. If you think this is a good starting point, would you mind pointing out what can be improved? Or better, you could draw a new one to benefit the whole community :)

[poweiw]

@nv-guomingz can you please take a look at this PR?

[nv-guomingz]

Thanks for contributing to TRT-LLM project. Given that our architecture has evolved a lot since the PR submission， I don't think we need to merge it into main.

Please close it.

[poweiw]

Closing based on https://github.com/NVIDIA/TensorRT-LLM/pull/428#issuecomment-2949212926