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

skills/README.md

@@ -19,7 +19,8 @@ npx skills add coracle-social/welshman
 | Skill | Description |
 |-------|-------------|
 | welshman | General overview, package map, getting started |
-| welshman-util | Core nostr types, events, filters, NIPs |
+| welshman-util | Core nostr types, events, filters, tags, NIPs (profiles/lists/handlers/rooms moved to domain) |
+| welshman-domain | Nostr event kinds as Reader/Builder classes: profiles, lists, rooms, handlers, zaps |
 | welshman-lib | Utilities: LRU, emitter, deferred, task queue |
 | welshman-net | Relay connections, request/publish, auth |
 | welshman-router | Relay selection strategies |