Add WebSearch Agent

src/main/kotlin/tools/BaseAgent.kt

@@ -0,0 +1,16 @@
+package top.jie65535.mirai.tools
+
+import com.aallam.openai.api.chat.Tool
+import kotlinx.serialization.json.JsonObject
+
+abstract class BaseAgent(
+    val tool: Tool
+) {
+    open val isEnabled: Boolean = true
+
+    abstract suspend fun execute(args: JsonObject): String
+
+    override fun toString(): String {
+        return "${tool.function.name}: ${tool.function.description}"
+    }
+}