feat(cli): move provider login/logout

docs/start/clawd.md

@@ -60,7 +60,7 @@ If you link your personal WhatsApp to CLAWDBOT, every message to you becomes “
 1) Pair WhatsApp Web (shows QR; scan with the assistant phone):
 
 ```bash
-clawdbot login
+clawdbot providers login
 ```
 
 2) Start the Gateway (leave it running):

docs/start/faq.md

@@ -430,7 +430,7 @@ You can add options like `debounce:2s cap:25 drop:summarize` for followup modes.
 Run the login command again and scan the QR code:
 
 ```bash
-clawdbot login
+clawdbot providers login
 ```
 
 ### Build errors on `main` — what’s the standard fix path?

docs/start/getting-started.md

@@ -99,7 +99,7 @@ https://github.com/oven-sh/bun/issues/5951
 ### WhatsApp (QR login)
 
 ```bash
-pnpm clawdbot login
+pnpm clawdbot providers login
 ```
 
 Scan via WhatsApp → Settings → Linked Devices.

docs/start/setup.md

@@ -46,7 +46,7 @@ pnpm clawdbot setup
 4) Link surfaces (example: WhatsApp):
 
 ```bash
-clawdbot login
+clawdbot providers login
 ```
 
 5) Sanity check:
@@ -56,7 +56,7 @@ clawdbot health
 ```
 
 If onboarding is still WIP/broken on your build:
-- Run `clawdbot setup`, then `clawdbot login`, then start the Gateway manually (`clawdbot gateway`).
+- Run `clawdbot setup`, then `clawdbot providers login`, then start the Gateway manually (`clawdbot gateway`).
 
 ## Bleeding edge workflow (Gateway in a terminal)