Migrate Manopt solver callbacks

[sChoiKr]

Summary

• separate Manopt display/debug actions from solver lifecycle callbacks
• route post-step, diagnostics, progress, and component-trace hooks through callbacks=
• preserve initial-point and per-step trace semantics with :Init and :Step
• require Manopt 0.6.2+, where the generic callback API is available

Root cause

TensorKitchen passed raw Julia callback functions through Manopt's legacy debug= path. Newer Manopt releases wrap those functions in deprecated DebugCallback actions, producing warnings when features such as component_trace=true are enabled.

Impact

RGD, fixed-step RGD, RCG, L-BFGS, and LM now keep display actions on debug= while lifecycle callbacks use callbacks=. Component traces retain one entry per completed solver iteration.