feat: support Topk data structure

[hidedim]

support 5 Operation.
TOPK.RESERVE key args(k, width, depth, decay): create TopK data structure.
TOPK.INFO key: reply information of args(k, width, depth, decay).
TOPK.ADD key value: add values to topk.
TOPK.QUERY key value: reply is value existed in topk.
TOPK.LIST key: reply item of topk.

[PragmaTwice]

Hi, thank you for your contribution!

Before we move on to the PR review, could you please provide a more detailed explanation of your design? For example, for features like timeseries (#3044) and t-digest (#2542), there were corresponding proposals that helped the community better understand the data structure design and the reasoning behind it. This makes it easier for community members to review the work and reach a consensus.

[hidedim]

Hi, thank you for your contribution!

Before we move on to the PR review, could you please provide a more detailed explanation of your design? For example, for features like timeseries (#3044) and t-digest (#2542), there were corresponding proposals that helped the community better understand the data structure design and the reasoning behind it. This makes it easier for community members to review the work and reach a consensus.

Hi, thank you for the reminder and for this opportunity.
I will promptly prepare a detailed design document.

[aleksraiden]

@hidedim lot of thanks about your work. Could you check issue with conflict?

[hidedim]

@hidedim lot of thanks about your work. Could you check issue with conflict?
Thanks for your reply. I will complete the conflict check this week.