feat: TOTP (two-factor) Authentication (#55)

* Working on some initial prototype stuff for TOTP

* Fixed a bug that prevented the change password menu from working

* Enable/disable totp working

* Added the new login procedure including TOTP! :)

* misc: Changed bad description for the TOTP_SECRET env var

* I forgot to include the migration for the new prisma stuff

* fix: refresh user context instead refreshing the page

* refactor: simplify totp error handling

* Removed U2F tab + format schema

* fix: tokens not saved in cookies

* refactor: deleted commented out code

* refactor: move password text to input description

* refactor: remove tabler icon package

Co-authored-by: Elias Schneider <login@eliasschneider.com>
Co-authored-by: Elias Schneider <58886915+stonith404@users.noreply.github.com>

backend/prisma/schema.prisma

@@ -19,6 +19,11 @@ model User {
 
   shares        Share[]
   refreshTokens RefreshToken[]
+  loginTokens   LoginToken[]
+
+  totpEnabled  Boolean @default(false)
+  totpVerified Boolean @default(false)
+  totpSecret   String?
 }
 
 model RefreshToken {
@@ -31,6 +36,17 @@ model RefreshToken {
   user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
 }
 
+model LoginToken {
+  token     String   @id @default(uuid())
+  createdAt DateTime @default(now())
+
+  expiresAt DateTime
+
+  userId String
+  user   User    @relation(fields: [userId], references: [id], onDelete: Cascade)
+  used   Boolean @default(false)
+}
+
 model Share {
   id        String   @id @default(uuid())
   createdAt DateTime @default(now())