Fix NIP conformance in domain kinds; add domain docs/skill

NIP fixes:
- RelayMembers (13534): use NIP-43 `member` tags (not `p`) and set the required
  NIP-70 `-` protected tag.
- Profile (kind 0): remove display-name support entirely (getter, setter, display()
  fallback, and the search weight).
- Comment (1111): A/a tags now carry a real address, not the event id.
- BlossomServerList (10063): normalize server URLs with normalizeUrl (HTTP), not
  normalizeRelayUrl (which forced wss://).
- HandlerRecommendation (31989): fix inverted removeRecommendation filter; add
  setSupportedKind()/supportedKind() for the NIP-89 d-tag.
- Report (1984): place the report-type string on the e tag (note reports) or p tag
  (profile reports); always emit the p tag.

Docs/skills:
- Add @welshman/domain docs (docs/domain/) and the welshman-domain skill.
- Prune @welshman/util docs/skill of the moved Profile/List/Handler/Encryptable
  helpers; register domain in the sidebar, index, and skills README.
- Apply accuracy fixes to the @welshman/app docs/skill.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BsMjvv7krpZeHK1Njeneru

docs/app/feeds-and-search.md

@@ -51,8 +51,8 @@ const relaySearch = get(searches.relaySearch)
 
 // A Search exposes both option objects and their values
 profileSearch.searchValues("alice")    // string[] — pubkeys; also fires a NIP-50 network search
-profileSearch.searchOptions("alice")   // PublishedProfile[]
-profileSearch.getOption(pubkey)        // PublishedProfile | undefined
+profileSearch.searchOptions("alice")   // Profile[]
+profileSearch.getOption(pubkey)        // Profile | undefined
 ```
 
 Profile results are ranked by blending the Fuse score with the WoT score, so well-trusted matches surface first. An empty search term returns all options.