Change type import rule (#13751)

Forcing "type" to be explicit, works best will rollup on the frontend to
exclude depdendencies

packages/twenty-server/src/engine/guards/__tests__/admin-panel-guard.spec.ts

@@ -1,4 +1,4 @@
-import { ExecutionContext } from '@nestjs/common';
+import { type ExecutionContext } from '@nestjs/common';
 import { GqlExecutionContext } from '@nestjs/graphql';
 
 import { AdminPanelGuard } from 'src/engine/guards/admin-panel-guard';

packages/twenty-server/src/engine/guards/__tests__/impersonate-guard.spec.ts

@@ -1,4 +1,4 @@
-import { ExecutionContext } from '@nestjs/common';
+import { type ExecutionContext } from '@nestjs/common';
 import { GqlExecutionContext } from '@nestjs/graphql';
 
 import { ImpersonateGuard } from 'src/engine/guards/impersonate-guard';

packages/twenty-server/src/engine/guards/__tests__/public-endpoint.guard.spec.ts

@@ -1,5 +1,5 @@
-import { ExecutionContext } from '@nestjs/common';
-import { Test, TestingModule } from '@nestjs/testing';
+import { type ExecutionContext } from '@nestjs/common';
+import { Test, type TestingModule } from '@nestjs/testing';
 
 import { PublicEndpointGuard } from 'src/engine/guards/public-endpoint.guard';