feat: expose `params` inside `findRoute`

[climba03003]

Since, find is used for lookup by the actual URL. It expose the params information.
However, in findRoute, it is lookup by the dev URL. It doesn't expose the meaningful params information to the user.

I know that find is exposing the params that is actual value extracted from URL.
So, in findRoute it should be exposing the dev array in below.

find-my-way/lib/handler-storage.js

Line 26 in a4d9262

params,

Related to fastify/fastify#5215

[Eomm]

It could simplify this feature too:

• feat: generate path params definition when missing fastify/fastify-swagger#761

[valerio-pizzichini]

I can try to take a look at this 🙌