Fix: Change Playwright browser tool from sync to async (#17808)

Author: jisonZ

llama-index-integrations/tools/llama-index-tools-playwright/README.md

@@ -2,6 +2,9 @@
 
 This tool is a wrapper around the Playwright library. It allows you to navigate to a website, extract text and hyperlinks, and click on elements.
 
+> **Warning**
+> Only support async functions and playwright browser APIs.
+
 ## Installation
 
 ```
@@ -10,55 +13,65 @@ pip install llama-index-tools-playwright
 
 ## Setup
 
-In order to use this tool, you need to have a sync Playwright browser instance. You can hook one up by running the following code:
+In order to use this tool, you need to have a async Playwright browser instance. You can hook one up by running the following code:
 
 ```python
-browser = PlaywrightToolSpec.create_sync_playwright_browser(headless=False)
-playwright_tool = PlaywrightToolSpec.from_sync_browser(browser)
+browser = PlaywrightToolSpec.create_async_playwright_browser(headless=False)
+playwright_tool = PlaywrightToolSpec.from_async_browser(browser)
 ```
 
 ## Usage
 
 ### Navigate to a website
 
 ```python
-playwright_tool.navigate_to("https://playwright.dev/python/docs/intro")
+await playwright_tool.navigate_to("https://playwright.dev/python/docs/intro")
+```
+
+### Navigate back
+
+```python
+await playwright_tool.navigate_back()
 ```
 
 ### Get current page URL
 
 ```python
-playwright_tool.get_current_page()
+await playwright_tool.get_current_page()
 ```
 
 ### Extract all hyperlinks
 
 ```python
-playwright_tool.extract_hyperlinks()
+await playwright_tool.extract_hyperlinks()
 ```
 
 ### Extract all text
 
 ```python
-playwright_tool.extract_text()
+await playwright_tool.extract_text()
 ```
 
 ### Get element attributes
 
 ```python
-element = playwright_tool.get_elements(
+element = await playwright_tool.get_elements(
     selector="ELEMENT_SELECTOR", attributes=["innerText"]
 )
 ```
 
 ### Click on an element
 
 ```python
-playwright_tool.click(selector="ELEMENT_SELECTOR")
+await playwright_tool.click(selector="ELEMENT_SELECTOR")
 ```
 
 ### Fill in an input field
 
 ```python
-playwright_tool.fill(selector="ELEMENT_SELECTOR", value="Hello")
+await playwright_tool.fill(selector="ELEMENT_SELECTOR", value="Hello")
 ```
+
+## Agentic Usage
+
+This tool has a more extensive example usage documented in a Jupyter notebook [here](https://github.com/run-llama/llama_index/blob/main/llama-index-integrations/tools/llama-index-tools-playwright/examples/playwright_browser_agent.ipynb)