docs: add "Implementations in the wild" section (refs #26, #66)

[YE-YI7]

Creates the Implementations in the wild section proposed in #26, and adds the ASM tool-selection catalog to it — following @mindpower's invitation in #66.

Per the README's contribution split this is a non-normative documentation change (no edits to spec/ard.md or spec/schemas/), so I'm opening it directly as a PR rather than an issue.

Conformance

Verified against the live endpoint with this repo's CLI (v0.5.0) immediately before opening:

$ conformance/bin/conformance-test manifest https://asm-spec.onrender.com/.well-known/ai-catalog.json
CONFORMANCE STATUS: PASS
Validated with 0 critical specification errors and 30 warnings.

All 30 warnings are the same finding — Media type 'application/asm+json' is not one of standard discovery types — which is exactly what #66 asks about. I've noted that inline in the table rather than leaving it implicit, so the row doesn't read as a clean bill of health while that question is still open. If you'd rather the section only list types already in the allowlist, I'm happy to drop the row until #66 is resolved.

One more caveat, also in the table: the catalog is hosted on a free tier that sleeps when idle, so the first request after a quiet period can be slow or need a retry. Flagging it up front so a timeout doesn't get read as a dead endpoint.

On #26

#26 proposed this same section back in June for five conformance-tested deployments (SnowSure, SnowData, Afore, LUXSKI, Ski Limone), and the section itself doesn't appear to have landed — so this PR creates it.

I've deliberately not added those five, since their conformance status isn't mine to assert. @mikeslone — happy to include them in this PR if you'd like, or maintainers can land them separately. Placement, ordering, and wording are all yours to change; I have no attachment to the table format.

(Implementation and this PR drafted with Claude, at my direction and with my approval.)

[mrenzo20]

Another candidate for the section when it lands: the Desvela ARD Registry, registry.desvela.dev. It is a weekly crawl of the Tranco top-100K for the four discovery paths, and it implements both roles, so it can sit in the table as host and as registry.

Verified with this repo's CLI immediately before writing:

conformance-test manifest https://desvela.dev/.well-known/ai-catalog.json
CONFORMANCE STATUS: PASS  (0 errors, 0 warnings)

conformance-test registry https://registry.desvela.dev
CONFORMANCE STATUS: PASS  (0 errors, 0 warnings)

The registry run failed when I did it this morning, so the honest version of that claim is that it passes as of today: the spec allows an entry to carry its payload inline in data rather than a url, my parser only read url, and search was returning entries with neither. Fixed and redeployed before writing this.

I have deliberately not opened a competing PR, since this one creates the section. Happy for it to land as is and to add a row afterwards, or for @YE-YI7 or a maintainer to fold it into this PR, whichever is less work for you.

One thing for whoever ends up maintaining the list: wellknownhq.com has been running a crawler and an open registry against this spec since 11 August. I have no connection to it and it competes with what I run, but a section called "implementations in the wild" is more useful if it is not limited to the people who happen to post in this repo.

Disclosure: I run Desvela.

[YE-YI7]

Thanks @mrenzo20 — Desvela and the independent WellKnownHQ crawler are exactly the kind of evidence that makes an implementations section useful rather than vendor-specific. I have not changed this PR's branch without maintainer direction, but either row can be folded in here or added immediately after merge.

One factual update on the ASM row now that its reproduction path exists:

• asm-protocol==0.5.2: https://pypi.org/project/asm-protocol/0.5.2/
• release: https://github.com/YE-YI7/asm-spec/releases/tag/v0.5.2
• current repo CLI against the live catalog: PASS, 0 critical errors, 30 unchanged warnings (one non-standard application/asm+json media-type warning per entry).

conformance/bin/conformance-test manifest https://asm-spec.onrender.com/.well-known/ai-catalog.json

No normative field or allowlist change is requested by this PR. This is my one follow-up; I will leave the listing and candidate rows with maintainers from here.