refacto(*): remove everything about default workspace (#9157)

## Summary
- [x] Remove defaultWorkspace in user
- [x] Remove all occurrence of defaultWorkspace and defaultWorkspaceId
- [x] Improve activate workspace flow
- [x] Improve security on social login
- [x] Add `ImpersonateGuard`
- [x] Allow to use impersonation with couple `User/Workspace`
- [x] Prevent unexpected reload on activate workspace
- [x] Scope login token with workspaceId 

Fix https://github.com/twentyhq/twenty/issues/9033#event-15714863042

packages/twenty-server/src/engine/core-modules/domain-manager/domain-manager.exception.ts

@@ -0,0 +1,11 @@
+import { CustomException } from 'src/utils/custom-exception';
+
+export class DomainManagerException extends CustomException {
+  constructor(message: string, code: DomainManagerExceptionCode) {
+    super(message, code);
+  }
+}
+
+export enum DomainManagerExceptionCode {
+  SUBDOMAIN_REQUIRED = 'SUBDOMAIN_REQUIRED',
+}

packages/twenty-server/src/engine/core-modules/domain-manager/service/domain-manager.service.ts

@@ -117,6 +117,14 @@ export class DomainManagerService {
     return subdomain;
   };
 
+  async getWorkspaceBySubdomainOrDefaultWorkspace(subdomain?: string) {
+    return subdomain
+      ? await this.workspaceRepository.findOne({
+          where: { subdomain },
+        })
+      : await this.getDefaultWorkspace();
+  }
+
   isDefaultSubdomain(subdomain: string) {
     return subdomain === this.environmentService.get('DEFAULT_SUBDOMAIN');
   }
@@ -137,7 +145,7 @@ export class DomainManagerService {
     return url.toString();
   }
 
-  async getDefaultWorkspace() {
+  private async getDefaultWorkspace() {
     if (!this.environmentService.get('IS_MULTIWORKSPACE_ENABLED')) {
       const workspaces = await this.workspaceRepository.find({
         order: {
@@ -147,7 +155,6 @@ export class DomainManagerService {
       });
 
       if (workspaces.length > 1) {
-        // TODO AMOREAUX: this logger is trigger twice and the second time the message is undefined for an unknown reason
         Logger.warn(
           `In single-workspace mode, there should be only one workspace. Today there are ${workspaces.length} workspaces`,
         );
@@ -161,7 +168,7 @@ export class DomainManagerService {
     );
   }
 
-  async getWorkspaceByOrigin(origin: string) {
+  async getWorkspaceByOriginOrDefaultWorkspace(origin: string) {
     try {
       if (!this.environmentService.get('IS_MULTIWORKSPACE_ENABLED')) {
         return this.getDefaultWorkspace();
@@ -171,12 +178,10 @@ export class DomainManagerService {
 
       if (!isDefined(subdomain)) return;
 
-      const workspace = await this.workspaceRepository.findOne({
+      return await this.workspaceRepository.findOne({
         where: { subdomain },
         relations: ['workspaceSSOIdentityProviders'],
       });
-
-      return workspace;
     } catch (e) {
       throw new WorkspaceException(
         'Workspace not found',