fix(readme): complete tool list in cbrain section

Third-pass audit: 'What cbrain gives you' was missing Google Calendar,
Playwright, and SwiftKit — claimed 'all of it' but listed only 6/10
productivity tools. Reordered to match canonical Step 5 order (Notion,
Granola, n8n, Google Calendar, Morgen, Motion Calendar, Playwright,
SwiftKit, Superhuman, Google Drive) with Obsidian appended after.

Author: fidgetcoding

README.md

@@ -829,7 +829,7 @@ That's it. `cbrain` opens Claude Code directly inside your 2ndBrain vault with a
 **What `cbrain` gives you:**
 - Drops you into your Obsidian vault automatically — no `cd`-ing around
 - All permissions skipped — Claude acts immediately, no approval prompts
-- Full access to everything: `/fswarm` (+ tiers `1`/`2`/`3`/`max`), `/fmini` (+ tiers `1`/`2`/`3`/`max`), `/fhive`, `/w4w`, `/safetycheck`, `/gitfix`, FidgetFlo, Morgen, Motion, Notion, Obsidian, Granola, n8n, Superhuman, Google Drive, design tools, video tools — all of it
+- Full access to everything: `/fswarm` (+ tiers `1`/`2`/`3`/`max`), `/fmini` (+ tiers `1`/`2`/`3`/`max`), `/fhive`, `/w4w`, `/safetycheck`, `/gitfix`, FidgetFlo, Notion, Granola, n8n, Google Calendar, Morgen, Motion Calendar, Playwright, SwiftKit, Superhuman, Google Drive, Obsidian, design tools, video tools — all of it
 - Your status line shows what's active at a glance
 
 **When to use something else:**