Feature: support path-based arguments

[Lancetnik]

Some brokers (RMQ, NATS, Redis, etc) allows you to consume messages by pattern
So, we can support path-based arguments in this case

from faststream import FastStream, Path
from faststream.nats import NatsBroker

broker = NatsBroker()
app = FastStream(broker)

@broker.subscriber("subject.{user_id}")
async def handler(msg, user_id: str = Path()):
    ...

[snorfalorpagus]

I can see this being a useful feature.

How would the different pattern matching syntaxes for RMQ/NATS/Redis/etc be handled? For example, RMQ supports either * (one word) or # (none or more words) as wildcards, while Redis uses glob-style patterns like * (none or more characters) and h[ae]llo. Would this just have to make an assumption (e.g. subject.{user_id} translates to subject.* in RMQ and subject.* in Redis)?

[Lancetnik]

It was just a little thought to add in backlog, without any details.
Sure, you are right {user_id} just a pattern for '.*' RMQ and '.\w' Redis case
There are no any problem to support different features for different brokers via ABCParser inheritors, so I have a plan to create unified syntax, but not all of its' features will be supported at all brokers cases