Introduce userWorkspaceRoles and Roles + seed standard admin role at workspace creation (#9929)

Closes https://github.com/twentyhq/core-team-issues/issues/303

packages/twenty-server/src/engine/metadata-modules/permissions/user-workspace-role.entity.ts

@@ -0,0 +1,39 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+  Relation,
+  Unique,
+  UpdateDateColumn,
+} from 'typeorm';
+
+import { RoleEntity } from 'src/engine/metadata-modules/permissions/role.entity';
+
+@Entity('userWorkspaceRole')
+@Unique('IndexOnUserWorkspaceRoleUnique', ['userWorkspaceId', 'roleId'])
+export class UserWorkspaceRoleEntity {
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @Column({ nullable: false, type: 'uuid' })
+  workspaceId: string;
+
+  @Column({ nullable: false, type: 'uuid' })
+  roleId: string;
+
+  @ManyToOne(() => RoleEntity, (role) => role.userWorkspaceRoles, {
+    onDelete: 'CASCADE',
+  })
+  role: Relation<RoleEntity>;
+
+  @Column({ nullable: false, type: 'uuid' })
+  userWorkspaceId: string;
+
+  @CreateDateColumn({ type: 'timestamptz' })
+  createdAt: Date;
+
+  @UpdateDateColumn({ type: 'timestamptz' })
+  updatedAt: Date;
+}