OIDC: add config flag (#11007)

* add settings flag for native oidc flow

* i18n

src/i18n/strings/en_EN.json

@@ -988,6 +988,7 @@
     "Favourite Messages": "Favourite Messages",
     "Under active development.": "Under active development.",
     "Force 15s voice broadcast chunk length": "Force 15s voice broadcast chunk length",
+    "Enable new native OIDC flows (Under active development)": "Enable new native OIDC flows (Under active development)",
     "Rust cryptography implementation": "Rust cryptography implementation",
     "Font size": "Font size",
     "Use custom size": "Use custom size",

src/settings/Settings.tsx

@@ -93,6 +93,7 @@ export enum LabGroup {
 export enum Features {
     VoiceBroadcast = "feature_voice_broadcast",
     VoiceBroadcastForceSmallChunks = "feature_voice_broadcast_force_small_chunks",
+    OidcNativeFlow = "feature_oidc_native_flow",
 }
 
 export const labGroupNames: Record<LabGroup, string> = {
@@ -445,6 +446,11 @@ export const SETTINGS: { [setting: string]: ISetting } = {
         displayName: _td("Force 15s voice broadcast chunk length"),
         default: false,
     },
+    [Features.OidcNativeFlow]: {
+        supportedLevels: LEVELS_FEATURE,
+        displayName: _td("Enable new native OIDC flows (Under active development)"),
+        default: false,
+    },
     "feature_rust_crypto": {
         // use the rust matrix-sdk-crypto-js for crypto.
         isFeature: true,