feat(*): allow to select auth providers + add multiworkspace with subdomain management (#8656)

## Summary
Add support for multi-workspace feature and adjust configurations and
states accordingly.
- Introduced new state isMultiWorkspaceEnabledState.
- Updated ClientConfigProviderEffect component to handle
multi-workspace.
- Modified GraphQL schema and queries to include multi-workspace related
configurations.
- Adjusted server environment variables and their respective
documentation to support multi-workspace toggle.
- Updated server-side logic to handle new multi-workspace configurations
and conditions.

packages/twenty-server/src/engine/core-modules/environment/environment-variables.ts

@@ -127,8 +127,22 @@ export class EnvironmentVariables {
   PG_SSL_ALLOW_SELF_SIGNED = false;
 
   // Frontend URL
-  @IsUrl({ require_tld: false, require_protocol: true })
-  FRONT_BASE_URL: string;
+  @IsString()
+  @IsOptional()
+  FRONT_DOMAIN = 'localhost';
+
+  @IsString()
+  @ValidateIf((env) => env.IS_MULTIWORKSPACE_ENABLED)
+  DEFAULT_SUBDOMAIN = 'app';
+
+  @IsString()
+  @IsOptional()
+  FRONT_PROTOCOL: 'http' | 'https' = 'http';
+
+  @CastToPositiveNumber()
+  @IsNumber()
+  @IsOptional()
+  FRONT_PORT = 3001;
 
   @IsUrl({ require_tld: false, require_protocol: true })
   @IsOptional()
@@ -227,6 +241,11 @@ export class EnvironmentVariables {
   @IsOptional()
   ENTERPRISE_KEY: string;
 
+  @CastToBoolean()
+  @IsOptional()
+  @IsBoolean()
+  IS_MULTIWORKSPACE_ENABLED = false;
+
   // Custom Code Engine
   @IsEnum(ServerlessDriverType)
   @IsOptional()
@@ -363,11 +382,6 @@ export class EnvironmentVariables {
   @ValidateIf((env) => env.WORKSPACE_INACTIVE_DAYS_BEFORE_NOTIFICATION > 0)
   WORKSPACE_INACTIVE_DAYS_BEFORE_DELETION = 60;
 
-  @CastToBoolean()
-  @IsOptional()
-  @IsBoolean()
-  IS_SIGN_UP_DISABLED = false;
-
   @IsEnum(CaptchaDriverType)
   @IsOptional()
   CAPTCHA_DRIVER?: CaptchaDriverType;