Add new OS.RPC "open_file" method for PIO Home

platformio/commands/home/rpc/handlers/os.py

@@ -82,6 +82,10 @@ class OSRPC(object):
             path.encode(get_filesystem_encoding()) if PY2 else path, locate=True
         )
 
+    @staticmethod
+    def open_file(path):
+        return click.launch(path.encode(get_filesystem_encoding()) if PY2 else path)
+
     @staticmethod
     def is_file(path):
         return isfile(path)