Output facelift: CoinTable class, phase markers, message suppression

[h-g-s]

Add CoinTable class with compact/bordered styles, ▶/✔/★/─ phase marker methods, and per-column segment separators in both UTF-8 and ASCII modes.

Suppress noisy MPS detail, presolve, and conflict-graph messages at the default log level (logLevel 1), promoting them to detail level 2:

• COIN_MPS_LINE / COIN_MPS_STATS / COIN_SOLVER_MPS: per-line parse noise and the 'read with N errors' summary are silenced; parse errors are instead captured by CbcImportHandler in Cbc and displayed in a structured block inside the Problem loading section.

• COIN_PRESOLVE_INFEAS / COIN_PRESOLVE_UNBOUND / COIN_PRESOLVE_NONOPTIMAL / COIN_PRESOLVE_POSTSOLVE / COIN_PRESOLVE_NEEDS_CLEANING / COIN_PRESOLVE_INTEGERMODS: transient presolve internal-state messages; the final solver outcome is always reported by CBC in the B&B phase-end banner and is unaffected by these.

• COIN_CGRAPH_INFO / COIN_CGRAPH_FIX_VAR: conflict-graph build stats are already shown in the Preprocessing table rendered by CbcPreprocHandler; the raw messages are redundant at logLevel 1.

This is part of a broader CBC output facelift series. The downstream Cbc/Clp/Cgl/Osi PRs depend on CoinTable from this change.

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