Add 70 filaments (Spectrum)

[cristinarz98]

Updated:

• PCTG GF10 (https://spectrumfilaments.com/en/filament/pctg-gf10/)
• PCTG Premium (https://spectrumfilaments.com/en/filament/pctg-premium/) fixed material density
• PCTG CF10 (https://spectrumfilaments.com/en/filament/pctg-cf10/)
• PET-G Carbon (https://spectrumfilaments.com/en/filament/pet-g-carbon/)
• PET-G FR V0 (https://spectrumfilaments.com/en/filament/pet-g-fr-v0/)
• PET-G FX120™ (https://spectrumfilaments.com/en/filament/pet-g-fx120/)
• PET-G Glitter (https://spectrumfilaments.com/en/filament/pet-g-glitter/)
• PET-G Glow in the Dark (https://spectrumfilaments.com/en/filament/pet-g-glow/)
• PET-G HT100™ (https://spectrumfilaments.com/en/filament/pet-g-ht100/)
• PET-G MATT (https://spectrumfilaments.com/en/filament/pet-g-matt/)
• PET-G Premium (https://spectrumfilaments.com/en/filament/pet-g-premium/)

Added:

• PET CF15 (https://spectrumfilaments.com/en/filament/pet-cf15/)
• PET-G Carbon (https://spectrumfilaments.com/en/filament/pet-g-carbon/): deleted petg carbon with wrong name.

Also added:

• material packages with GTIN/EAN number and URLs.
• material properties.
• filament photos