fix: dev qol, scrap total ui, experimental features

[remiX-]

• Improved dev & mod api quality of life
  • Terminal commands can be setup via a [TerminalCommand] attribute
  • Modules can be easily added in a static or instance manner via the [Module] attribute
  • see the example plugins under samples/
• Scrap UI: Add total scrap tally to first item slot
• Added 2 experimental commands: vs, view. This is disabled by default.