Add visit web tool

Add send message tools
Update version to v1.7.0

src/main/kotlin/tools/SendSingleMessageAgent.kt

@@ -0,0 +1,33 @@
+package top.jie65535.mirai.tools
+
+import com.aallam.openai.api.chat.Tool
+import com.aallam.openai.api.core.Parameters
+import kotlinx.serialization.json.*
+import net.mamoe.mirai.event.events.MessageEvent
+import top.jie65535.mirai.JChatGPT
+
+class SendSingleMessageAgent : BaseAgent(
+    tool = Tool.function(
+        name = "sendSingleMessage",
+        description = "发送一条消息，适合发送一行以内的短句（不支持Markdown）",
+        parameters = Parameters.buildJsonObject {
+            put("type", "object")
+            putJsonObject("properties") {
+                putJsonObject("content") {
+                    put("type", "string")
+                    put("description", "消息内容")
+                }
+            }
+            putJsonArray("required") {
+                add("content")
+            }
+        }
+    )
+) {
+    override suspend fun execute(args: JsonObject?, event: MessageEvent): String {
+        requireNotNull(args)
+        val content = args.getValue("content").jsonPrimitive.content
+        event.subject.sendMessage(JChatGPT.toMessage(event.subject, content))
+        return "OK"
+    }
+}