Auto Brightness, German, Spanish update

Happy New Year! Here is the 2023 first update! [b]v1.5.0[/b] - Add "Auto Brightness". - Add German. - Add Spanish. - Add sidebar icons. - Adjust default setting values. [h2]Auto Brightness[/h2] Auto brightness feature adjusts the grid brightness of the room effect automatically. When you push a thumbstick, this tool calculates the average brightness from a game scene. If you walk under the sun, it makes the grid bright. When you explore a dark cave, the grid changes to dark. You can toggle this feature from [b]Room Setting > Auto Brightness[/b]. [previewyoutube=dAsGQpUXhsg;full][/previewyoutube] [h2]Language Support[/h2] German and Spanish are added. If you help translate, please check this sheet and contact dev via official discord or twitter. https://docs.google.com/spreadsheets/d/1tgkIYqT3WzoMLksAu_GDM59Ei4MEeFNyT7hgVXoS5S0/edit?usp=sharing [h2]Other[/h2] New sidebar icons are added. The default setting value is adjusted when the first launch.