fix: sync published content with the current platform (context contract, tool roster, version)

- README project context: .spaghetti file (rejected design) →
  Config/DefaultGame.ini [/Script/Spaghetti.SpaghettiProjectSettings]
  via the editor connector's Project Settings; "setup CLI is coming"
  dropped (CLI is reserve) in favor of roadmap-neutral wording
- SKILL.md: prerequisites now describe the ini section and the
  personal-account fallback (the old "Agentic Directive creates
  .spaghetti" mechanism never shipped); tool roster renamed to the
  live server's (analyze_logs, tidy_assets, five free research tools
  incl. project-scoped temporal ones); context/billing section
  updated with the 402=credits vs 403=sign-in/onboarding taxonomy
- plugin.json: version 0.1.1 → 0.3.1, tracking the editor connector

mcp.json unchanged — URL-only config is already correct for the
first-party AS (CIMD/DCR discovery, no credentials in the manifest).

README.md

@@ -30,16 +30,15 @@ Sign in once at [spaghetti.gg](https://spaghetti.gg) — your account is created
 
 ## Project context (optional)
 
-Your UE5 project can have a `.spaghetti` file at its root:
+Your UE5 project can be linked to a Spaghetti team and project. With the Spaghetti editor connector (UE 5.8+) installed, the link lives in the project's own configuration — Project Settings → Plugins → Spaghetti — persisted to `Config/DefaultGame.ini`:
 
-```json
-{
-  "team_id": "your-team-uuid",
-  "project_id": "your-project-uuid"
-}
+```ini
+[/Script/Spaghetti.SpaghettiProjectSettings]
+TeamId=your-team-uuid
+ProjectId=your-project-uuid
 ```
 
-Team and project ids are UUIDs; a setup CLI that fetches them and writes this file automatically is coming. Until then, all tools also work on your personal account without this file. The file is safe to commit to Git/Perforce (no secrets).
+No secrets — safe to commit to Git/Perforce. Everyone opening the project works on the same team/project, while each user still signs in individually. Automatic team/project wiring is on the roadmap; until then, all tools also work on your personal account without any context. Details: [spaghetti.gg/docs](https://spaghetti.gg/docs).
 
 ## Structure