* Add Cubicon xCeler-Mini printer model and material profiles
- Add xCeler-Mini machine configuration and 0.4mm nozzle profile
- Add filament profiles for all Cubicon materials (PLA, PLA+, PLAi21, ABS, ABSk, ABS-A100, PETG, PC, PA-CF) for xCeler-Mini
- Add default process profile for xCeler-Mini 0.4mm nozzle
- Add xCeler-Mini cover image
- Update Cubicon.json to register xCeler-Mini machine, filaments, process, and machine list
- Update PA-CF and PLA base filament profiles (filament_max_volumetric_speed adjustment)
- Fix missed per-machine filament and process profiles for xCeler-I and xCeler-Plus
* fix format
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Co-authored-by: SoftFever <softfeverever@gmail.com>
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