Implement desktop app version of KasVault

[coderofstuff]

• consider removing next.js and use pure react JS
• consider using electron to implement the desktop app
• must remain deployable to kasvault.io and also run as desktop app
• requires different transport to be used in web version and desktop version (load the appropriate one accordingly)

[kirito41dd]

tauri is more suitable than electron. power by rust.