Resolve CLI resource profiles by printer vendor

[adenta]

Summary

This is a focused follow-up to #689 for the profile-resolution part of headless CLI slicing. It does not replace the existing crash fixes in #560, #561, #562, or #761.

The CLI currently resolves embedded system presets and printer model metadata through hard-coded profiles/BBL paths. This change introduces an internal ResourceProfileResolver that:

• derives the vendor from the printer preset and/or printer model;
• loads flattened machine, process, and filament presets from that vendor bundle;
• resolves vendor-specific printer model IDs (including Snapmaker U1 SM_U1);
• supports shared OrcaFilamentLibrary inheritance;
• rejects ambiguous names unless printer vendor context disambiguates them; and
• resolves optional vendor-scoped resources such as cli_config.json.

Bambu Lab remains the same supported path, but it is no longer the only hard-coded profile root. There are no public CLI syntax changes.

Relationship to existing PRs

• Fix CLI assemble-list crash during plate loading #560 hardens CLI plate loading.
• Fix CLI crash when normalizing process-only profile without nozzle_diameter #561 and Fix crash in normalize_fdm when nozzle_diameter is absent #761 address the process-only normalize_fdm() null dereference.
• Fix CLI crash from GUI filament state during extruder expansion #562 removes a GUI filament-state dependency from CLI extruder expansion.

Those fixes are complementary and intentionally excluded from this diff.

Validation

• Clean arm64 Release build of Snapmaker_Orca and libslic3r_tests: passed.
• libslic3r_tests '[ResourceProfileResolver]': 34 assertions in 4 test cases, all passed.
• Coverage includes Snapmaker U1 vendor discovery, flattened U1 machine/process/filament presets, SM_U1, shared filaments, ambiguous Generic PLA, and BBL regression behavior.
• Local combined validation branch using the exact commits from Fix CLI assemble-list crash during plate loading #560, Fix CLI crash from GUI filament state during extruder expansion #562, and Fix crash in normalize_fdm when nozzle_diameter is absent #761:
  • Snapmaker U1 / 0.20 Standard / 20 mm cube CLI slice: exit 0 in 2.07 s.
  • Bambu Lab X1 Carbon / 0.20 Standard / 20 mm cube CLI slice: resolved BL-P001 under vendor BBL, exit 0 in 2.07 s.

The combined validation branch and test models are not part of this PR.