aider: Add check to see if Playwright needs to install Chromium and its dependencies.

# Aider chat conversation:

USER: include a check to see if playwright needs to install chromium and it's deps

ASSISTANT: Here is the updated `playw.py` file with the check to see if Playwright needs to install Chromium and its dependencies:

```diff
--- playw.py
+++ playw.py
@@ ... @@
 import sys
+from playwright.__main__ import main as playwright_install

 def main(url):
+    # Check if Chromium is installed, if not, install it
+    try:
+        with sync_playwright() as p:
+            p.chromium.launch()
+    except Exception as e:
+        print("Chromium is not installed. Installing necessary dependencies...")
+        playwright_install(['install', 'chromium'])
+
     with sync_playwright() as p:
         browser = p.chromium.launch()
         page = browser.new_page()
         page.goto(url)
         content = page.content()
         print(content)
         browser.close()

 if __name__ == "__main__":
     if len(sys.argv) < 2:
         print("Usage: python playw.py <URL>")
         sys.exit(1)
     main(sys.argv[1])
```

This diff adds a check before the main function to see if Chromium can be launched. If an exception occurs, it assumes Chromium is not installed and proceeds to install it using Playwright's command-line interface.

playw.py

@@ -1,7 +1,16 @@
 from playwright.sync_api import sync_playwright
 import sys
+from playwright.__main__ import main as playwright_install
 
 def main(url):
+    # Check if Chromium is installed, if not, install it
+    try:
+        with sync_playwright() as p:
+            p.chromium.launch()
+    except Exception as e:
+        print("Chromium is not installed. Installing necessary dependencies...")
+        playwright_install(['install', 'chromium'])
+
     with sync_playwright() as p:
         browser = p.chromium.launch()
         page = browser.new_page()