Add Epic free games query.

Disable ip address query.

src/main/kotlin/tools/EpicFreeGame.kt

@@ -0,0 +1,23 @@
+package top.jie65535.mirai.tools
+
+import com.aallam.openai.api.chat.Tool
+import com.aallam.openai.api.core.Parameters
+import io.ktor.client.request.*
+import io.ktor.client.statement.*
+import kotlinx.serialization.json.JsonObject
+
+class EpicFreeGame : BaseAgent(
+    tool = Tool.function(
+        name = "getEpicFreeGames",
+        description = "可查询Epic免费游戏",
+        parameters = Parameters.Empty
+    )
+) {
+    // https://docs.60s-api.viki.moe/
+
+    override suspend fun execute(args: JsonObject?): String {
+        // https://docs.60s-api.viki.moe/254044293e0
+        val response = httpClient.get("http://60s-api.viki.moe/v2/epic")
+        return response.bodyAsText()
+    }
+}