feat: add cli arg and interactive prompt for bucket name

[arsdehnel]

Closes #107

In contrast to #201 I added the bucket naming to the create-pds CLI's variables here. I think the auto-naming convention of wrangler is useful but for the reasons mentioned in that PR's discussion I think this use case might not be a good one for it.

Docs

I updated a few places in the docs that reference buckets. Most notably was a change only indirectly related to my code change. There were two places that mentioned that bucket names must be globally unique. I don't believe that's the case with Cloudflare's buckets (although it definitely is the case with other cloud provider bucket implementations).

create-pds

I added an optional CLI arg for --blobs-bucket-name which effectively defaults to pds-blobs although to allow for the "should we prompt" logic I didn't use citty's default option and instead followed the pattern of projectName. I think write that to the wrangler.jsonc after copying it over from the template directory following the package.json pattern.

Tests

I added a few tests but not sure how you will feel about the basic string-matching of the assertions. Open to other ideas.

Changeset

I've never managed or contributed to a monorepo that uses that so hopefully I got that right!