feat: implement project settings management with CRUD operations and caching

src/project/settings/entities/project.setting.entity.ts

@@ -0,0 +1,19 @@
+import { Column, Entity, ManyToOne, PrimaryGeneratedColumn } from "typeorm";
+import { Project } from "../../entities/project.entity";
+
+@Entity("projectSetting")
+export class ProjectSetting {
+  @PrimaryGeneratedColumn("uuid")
+  id: string;
+
+  @ManyToOne(() => Project, (project) => project.settings, {
+    onDelete: "CASCADE",
+  })
+  project: Project;
+
+  @Column({ type: "varchar", length: 255, nullable: false })
+  key: string;
+
+  @Column({ type: "text", nullable: false })
+  value: string;
+}