[FEAT]: memory management for deft kernel tests

[Monstertail]

Description

Q1: shall we design KV memory management before kernel design to include some features like paged mem?
Q2: shall we somehow decouple the mem management design and perf test for cuda kernel?

Additional Information

No response

[Monstertail]

[ KV manager choices]

1. radix tree from SGLang;
2. vllm;
3. ours.

Q1: can we only release a kernel that fit the mem management of vllm/sglang?
Q2: if not, how to get an easiest modified version of mem manager from other frameworks like sglang and vllm?

@chiakicage