🎉 Huge update with breaking changes

Breaking changes

• removed exclude prefix option ("_" and "." still work as they do everywhere else within figma)
• removed output filename from send url payload
• changed color category from fill to color to be compatible with style dictionary
• changed category for gradients from fill to gradient fixes #84
• separate gradient from color into its own category
• removed unsupported empty borders from export #24

Minor changes

• moved file name option to file export ui
• allow users to define token top level prefixes #30
• allow users to toggle if top level prefixes are included in name #31
• trap focus in dialog #113
• add reset settings function