prepare template based on protocol

[glencoe]

Fill template values that are already known from the protocol automatically.

Background

The only protocol we use right now already specifies several parameters.
These parameters have to be provided by the class implementing the layer via the port property.
However as a hw designer i currently still have to insert these values into the template myself every time. E.g. like this

config.parameters.update(
  {
    f"{signal}_width": f"{design.port[signal].width}"
    for signal in ("y", "x", "y_address", "x_address")
  }
)

Therefore i suggest we insert these values automatically before generating the code.
I'll call that automatic port protocol expansion.

Possible caveats

As a designer i can override a value by inserting it myself before it is inserted automatically.
But that also means one could override it accidentally and without notice.
To mitigate the risk we could later issue a warning in case the port protocol expansion does not find the expected template variables.

Any thoughts on this from @SuperChange001 and @telefonjoker100 ?