Redesign, new options, USD and more

What's Changed

• Changed app design
• Added rendering as points
• Added material roughness, metallic, color and opacity
• Added loading as scene or geometry
• Added movements with keys
• Improved HDRI loading UI
• Added dark/light/follow theme selection

• Create italian language by @albanobattistella in #2
• Update it.po by @albanobattistella in #3
• Add spanish translation by @haggen88 in #4
• Update it.po by @albanobattistella in #5
• Added Bulgarian translation by @twlvnn in #8
• Initial Hindi Translation by @Scrambled777 in #9
• Add Brazilian Portuguese translation by @tiagoFlach in #15
• Add USD support by @Nokse22 in #16

New Contributors

• @albanobattistella made their first contribution in #2
• @haggen88 made their first contribution in #4
• @twlvnn made their first contribution in #8
• @Scrambled777 made their first contribution in #9
• @tiagoFlach made their first contribution in #15

Full Changelog: v1.0.1...v1.2.0