Stage v2.0.0 from dev to main

[WolfwithSword]

• Port entire UI from WPFUI to AvaloniaUI
  • Rebuilt entirely, oh god
• MultiPlatform
  • Maintain windows build
  • Native Linux build
    • WebView is still broken, known linux bug with avalonia native webview
  • Native macOS Builds (intel & apple silicon)
• Auto Updater behaviour enhanced, auto open after update is now working. Due to Avalonia port
• Add SubscriptionTotals websocket msg to support new usecases
• Add new preset theme harelquin
• New concept: SMW and SMWC file associations
  • All widgets from presets converted to SMW files (widgets). Double click to import into library
  • New Widget Browser, includes all downloaded and all presets
  • SMW is a zip of a widget with some data overwritten and meta saved. SMWC is a zip of multiple SMW's (double clicking will import all)
  • SMW's will load from memory (cache, shared) when requested from an overlay, but large files will unzip to a temp cache.
  • SMWs can be versioned with an update path
  • SMO's will still unpack on import but versioned now, no update path
  • SMW's can be unpacked to loose files by choice. SMWs can also be created from a html unpacked widget, improved export
    dialogues
  • For loose widget files from presets as a guide, unzip a smw file
• Can delete trigger and wheelspin history properly now
• Fix external custom subs not being able to be added. Same for YT memberships
• Migrated webserver fully to kestrel for better crossplatform compatibility, including browsersource + file host, websockets, and REST backend
  • Added resources directory accessible across any widget/overlay provided by webserver

closes #308
closes #305
closes #302
closes #301
closes #306

[WolfwithSword]

lgtca