Creates a verbose printing function based on trace level settings. Messages are printed only if their level is <= trace_level.
create_verboser(trace_level = 0)A function with signature: `verboser(msg, level = 1, type = c("info", "step", "detail", "result"))`
Integer 0-3; controls verbosity detail: - 0: No output (silent mode) - 1: Major steps only (initialization, convergence) - 2: Moderate detail (iteration summaries, key diagnostics) - 3: Full detail (all diagnostics, intermediate values)