Make fences be able to connect to walls

As the title suggests, I'd like fences and walls to be able to connect with one another, enabling more diverse and creative building designs. 

To ensure backwards compatibility with previous versions of the game and with any existing farms or contraptions that rely on fences and walls not connecting, this behavior could be made optional. For example, a fence or wall would only connect when the player right-clicks on the face of the other block instead of placing it normally.

The block being placed would dictate the texture and shape of the resulting connection. If the block is placed normally, it would retain its current behavior and would not connect.

Example: If a player places a fence onto the face of a wall, the connection would resemble a fence. Conversely, if a wall is placed onto the face of a fence, the resulting connection would resemble a wall.