Proposal: Add slog QueryHook for Bun logging

[hirasawayuki]

Description

This issue proposes the addition of a new package, tentatively named bunslog, to provide enhanced logging functionalities for the Bun using slog.

Bun currently supports various logging solutions as mentioned in the debugging guide. However, there is no support for slog, a structured logging package. Notably, slog has been included in the Go standard library starting from version 1.21, which might a increase in demand.