feat(wait): allow waiting for given text (#390)

Fixes https://github.com/microsoft/playwright-mcp/issues/389

README.md

@@ -518,11 +518,13 @@ X Y coordinate space, based on the provided screenshot.
 
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-- **browser_wait**
-  - Title: Wait
-  - Description: Wait for a specified time in seconds
+- **browser_wait_for**
+  - Title: Wait for
+  - Description: Wait for text to appear or disappear or a specified time to pass
   - Parameters:
-    - `time` (number): The time to wait in seconds
+    - `time` (number, optional): The time to wait in seconds
+    - `text` (string, optional): The text to wait for
+    - `textGone` (string, optional): The text to wait for to disappear
   - Read-only: **true**
 
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