log: integrate slog and logrotate

[wenchy]

slog

• Structured Logging with slog: https://go.dev/blog/slog
• stdlib: https://pkg.go.dev/golang.org/x/exp/slog
• https://github.com/uber-go/zap/tree/master/exp

logrotate

• logrotate: https://github.com/gounknown/logrotate