refactor(core): initial multiple servers infra (#8745)

This is the initial refactoring of affine to support multiple servers, but many more changes are needed to make multi-server actually work.

packages/frontend/graphql/src/graphql/index.ts

@@ -998,6 +998,7 @@ query serverConfig {
     name
     features
     type
+    initialized
     credentialsRequirement {
       ...CredentialsRequirement
     }

packages/frontend/graphql/src/graphql/server-config.gql

@@ -8,6 +8,7 @@ query serverConfig {
     name
     features
     type
+    initialized
     credentialsRequirement {
       ...CredentialsRequirement
     }

packages/frontend/graphql/src/index.ts

@@ -2,23 +2,3 @@ export * from './error';
 export * from './fetcher';
 export * from './graphql';
 export * from './schema';
-
-import { setupGlobal } from '@affine/env/global';
-
-import { gqlFetcherFactory } from './fetcher';
-
-setupGlobal();
-
-export function getBaseUrl(): string {
-  if (BUILD_CONFIG.isElectron || BUILD_CONFIG.isIOS || BUILD_CONFIG.isAndroid) {
-    return BUILD_CONFIG.serverUrlPrefix;
-  }
-  if (typeof window === 'undefined') {
-    // is nodejs
-    return '';
-  }
-  const { protocol, hostname, port } = window.location;
-  return `${protocol}//${hostname}${port ? `:${port}` : ''}`;
-}
-
-export const fetcher = gqlFetcherFactory(getBaseUrl() + '/graphql');

packages/frontend/graphql/src/schema.ts

@@ -2175,6 +2175,7 @@ export type ServerConfigQuery = {
     name: string;
     features: Array<ServerFeature>;
     type: ServerDeploymentType;
+    initialized: boolean;
     credentialsRequirement: {
       __typename?: 'CredentialsRequirementType';
       password: {