Resolve logger/colorwriter import cycle in CI

[Copilot]

The CGO workflow’s build, lint, WASM, Alpine, and fuzz jobs failed before execution due to an import cycle between pkg/logger and pkg/colorwriter.

• Dependency boundary
  • Keep pkg/colorwriter as a low-level dependency of pkg/logger.
  • Remove the reverse pkg/logger dependency from pkg/colorwriter.

// colorwriter must not import pkg/logger:
// logger -> colorwriter -> logger

• Fixes [CGO][FUZZ] Workflow failure on main - Run #21724 #51561