fix: support PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH env var for NixOS

src/auto_reverse/browser.py

@@ -14,6 +14,8 @@ class Browser:
         self._page: Any = None
 
     def start(self) -> None:
+        import os
+
         from playwright.sync_api import sync_playwright
 
         self._pw = sync_playwright().start()
@@ -23,6 +25,8 @@ class Browser:
         }
         if self._proxy_port is not None:
             launch_kwargs["proxy"] = {"server": f"http://127.0.0.1:{self._proxy_port}"}
+        if exe_path := os.environ.get("PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH"):
+            launch_kwargs["executable_path"] = exe_path
         self._browser = self._pw.chromium.launch(**launch_kwargs)
         context = self._browser.new_context(ignore_https_errors=True)
         self._page = context.new_page()