feat(webui): add Creator 5 series support

[GhostTypes]

Adds Creator 5 / 5 Pro support to the standalone WebUI, at parity with the desktop FlashForgeUI-Electron implementation.

Backend

• New Creator5Backend (extends AD5XBackend): model detection, HTTP-only connection, per-tool/chamber/TVOC status fields, and model-tagged material-station status.
• PrinterUtils model detection for creator-5 / creator-5-pro (PIDs 40/41).
• Bumps @ghosttypes/ff-api to ^1.6.1.

WebUI

• Multi-tool temperature card (per-tool + bed + chamber heaters) with a discriminated TemperatureTarget dialog.
• Read-only TVOC air-quality display for the Creator 5 Pro (hides its non-functional filtration controls).
• Generalized IFS/material-station palette + slot editor (AD5X and Creator 5 share one card; palette resolved per model).
• Feature-gating for the multi-tool card, TVOC, and mutually-exclusive single-nozzle vs. multi-tool cards.

Bug fixes (from review)

• Transformer: per-tool target temps now read the ff-api set key (previously read a non-existent target, defaulting every nozzle target to 0°C).
• REST /api/printer/status: same set fix so toolTemps[].target returns a real number instead of null.
• Temperature routes: tool index now upper-bounded (0-3) for a clean 400 on out-of-range indices.

Tests

• New PrinterDataTransformer.test.ts covering the Creator 5 tool/chamber set→target mapping (regression guard) and single-nozzle omission.
• Validation: type-check, lint, 153 jest tests, and build all pass.

Note: local data/ runtime state and .pi/settings.json were intentionally excluded from this branch.