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/seed/config.seed.ts

@@ -52,6 +52,13 @@ const configVariables: Prisma.ConfigCreateInput[] = [
     value: crypto.randomBytes(256).toString("base64"),
     locked: true,
   },
+  {
+    key: "TOTP_SECRET",
+    description: "A 16 byte random string used to generate TOTP secrets",
+    type: "string",
+    value: crypto.randomBytes(16).toString("base64"),
+    locked: true,
+  },
   {
     key: "ENABLE_EMAIL_RECIPIENTS",
     description: