feat: implement Redis client and plugin with basic operations

src/redis/redis.service.ts

@@ -9,4 +9,40 @@ export class RedisClient {
   constructor(private readonly redisService: RedisService) {
     this.redis = this.redisService.getOrThrow();
   }
+
+  async set(
+    key: string,
+    value: string,
+    expireInSeconds?: number
+  ): Promise<"OK" | null> {
+    if (!this.redis) {
+      return null;
+    }
+
+    if (expireInSeconds) {
+      return await this.redis.set(key, value, "EX", expireInSeconds);
+    }
+
+    return await this.redis.set(key, value);
+  }
+
+  async get(key: string): Promise<string | null> {
+    if (!this.redis) {
+      return null;
+    }
+
+    return await this.redis.get(key);
+  }
+
+  async del(key: string): Promise<number | null> {
+    if (!this.redis) {
+      return null;
+    }
+
+    return await this.redis.del(key);
+  }
+
+  getClient(): Redis | null {
+    return this.redis;
+  }
 }