feat: multiple oauth providers (#355)

* feat: add flag decoder (candidate)

* refactor: finalize flags decoder

* feat: add env decoder

* feat: add oauth config parsing logic

* feat: implement backend logic for multiple oauth providers

* feat: implement multiple oauth providers in the frontend

* feat: add some default icons

* chore: add credits for parser

* feat: style oauth auto redirect screen

* fix: bot suggestions

* refactor: rework decoders using simpler and more efficient pattern

* refactor: rework oauth name database migration

frontend/src/schemas/app-context-schema.ts

@@ -1,14 +1,19 @@
 import { z } from "zod";
 
+export const providerSchema = z.object({
+  id: z.string(),
+  name: z.string(),
+  oauth: z.boolean(),
+});
+
 export const appContextSchema = z.object({
-  configuredProviders: z.array(z.string()),
+  providers: z.array(providerSchema),
   title: z.string(),
-  genericName: z.string(),
   appUrl: z.string(),
   cookieDomain: z.string(),
   forgotPasswordMessage: z.string(),
-  oauthAutoRedirect: z.enum(["none", "github", "google", "generic"]),
   backgroundImage: z.string(),
+  oauthAutoRedirect: z.string(),
 });
 
 export type AppContextSchema = z.infer<typeof appContextSchema>;