docs: three claims that no longer match the code (#148)

- start/setup says "Three are shipped" above four templates. Four ship
  (internal/templates/files: docs, para, skills, wiki).
- guides/shared-agent-memory tells the reader to run `/beardrive:install`.
  There is no such command — no plugin, no skill; the integration is
  internal/agenthooks and setup is the paste on start/setup.
- index lists SSO as part of the managed service. No SAML/OIDC exists
  anywhere, and the cloud plan has it unstarted.


Claude-Session: https://claude.ai/code/session_01UmhLKHq3QTHjkDi2wCDhNB

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

web/docs/src/content/docs/guides/shared-agent-memory.md

@@ -73,7 +73,7 @@ A dedicated folder with no enclosing repository needs only the synced
 `AGENTS.md`. At the mount root, every platform loads it at session start.
 :::
 
-`/beardrive:install` offers to write both files, each as its own consent. Never
+Ask your agent to write them and it will offer each as its own consent. Never
 write either silently into someone's repository.
 
 ## The orientation ritual

web/docs/src/content/docs/index.md

@@ -87,4 +87,4 @@ You need a hub to sync through. Two ways to get one:
 GNU AGPL-3.0. Everything in the repository is open source and self-hostable — a
 complete BearDrive server for one organization's deployment, teams included. The
 managed service at beardrive.ai is the same core plus what only makes sense as
-an operated service: hosting, SSO, billing and plan quotas, backups, support.
+an operated service: hosting, billing and plan quotas, backups, support.

web/docs/src/content/docs/start/setup.md

@@ -33,7 +33,7 @@ Starting from nothing (no project id, no name), it recommends `shared/` and
 names the new project `shared`.
 
 If the folder turns out to be empty once it is connected, the agent offers one
-more choice: start from a structure, or from scratch. Three are shipped:
+more choice: start from a structure, or from scratch. Four are shipped:
 
 - **Docs + decision records** (`docs/`, `decisions/`) — the boring default, and
   the one to take if you are not sure.