Catch all routes ex. [...slug].svelte

[rlindskog]

Is your feature request related to a problem? Please describe.
I'd like the ability to have catch all functionality for scenarios where I don't know the number of parameters ahead of time.

Describe the solution you'd like
Ability to create a catch-all route by naming a file.
Example:

• /src/routes/posts/[...slug].svelte
• user navigates to /posts/a/b
• page.params would then contain { "slug": ["a", "b"] }

Additional context
Inspired by next.js: https://nextjs.org/docs/routing/dynamic-routes#catch-all-routes

[Conduitry]

These already exist - #545 / #607 - but we still haven't gotten around to documenting them yet 😬

[kevmodrome]

I made a PR for this: #1077

[Conduitry]

Thanks! Made a couple of adjustments, merged, and deployed.

[rlindskog]

Excellent, thanks everyone!