Add "Researching your answer..." text to progress message (#1214)

More clearly indicate the bot is working and users should wait to respond

Author: bdalpe

examples/slackbot/src/slackbot/_internal/tool_tracking.py

@@ -56,7 +56,14 @@ async def update_progress(self, tool_name: str):
         token = current_tool.set(tool_name)
         try:
             counts = self.get_counts()
-            lines = [f"🔧 Using: `{tool_name}`", ""]
+
+            lines = [
+                "🔄 Researching your answer... this may take a while",
+                "",
+                "",
+                f"🔧 Using tool: `{tool_name}`",
+                "",
+            ]
 
             if counts:
                 lines.append("📊 Tools used:")