feat(premium): add the Plutonium page behind an experiment (#3097)

packages/schema/src/domains/admin/AdminSchemas.ts

@@ -24,6 +24,10 @@ import {
 	InstanceBillingResponse,
 	InstanceBillingUpdateRequest,
 } from '@fluxer/schema/src/domains/admin/InstanceBillingSchemas';
+import {
+	PlutoniumPageConfigResponse,
+	PlutoniumPageConfigUpdateRequest,
+} from '@fluxer/schema/src/domains/admin/PlutoniumPageSchemas';
 import {PushRelayConfigResponse, PushRelayConfigUpdateRequest} from '@fluxer/schema/src/domains/admin/PushRelaySchemas';
 import {
 	ExperimentDeliveryConfigResponse,
@@ -638,6 +642,7 @@ export const InstanceConfigResponse = z.object({
 	gateway_rollout: GatewayRolloutConfigResponse,
 	push_relay: PushRelayConfigResponse,
 	domain_migration: DomainMigrationConfigResponse,
+	plutonium_page: PlutoniumPageConfigResponse,
 	captcha: CaptchaConfigResponse,
 	experiment_delivery: ExperimentDeliveryConfigResponse,
 	registration: InstanceRegistrationResponse,
@@ -671,6 +676,7 @@ export const InstanceConfigUpdateRequest = z.object({
 	gateway_rollout: GatewayRolloutConfigUpdateRequest.nullish(),
 	push_relay: PushRelayConfigUpdateRequest.nullish(),
 	domain_migration: DomainMigrationConfigUpdateRequest.nullish(),
+	plutonium_page: PlutoniumPageConfigUpdateRequest.nullish(),
 	captcha: CaptchaConfigUpdateRequest.nullish(),
 	experiment_delivery: ExperimentDeliveryConfigUpdateRequest.nullish(),
 	registration: z