Update SSH examples to include root@ prefix

- Remove redundant examples without user prefix from ssh.ts help text
- Add root@ prefix to all remaining SSH examples in ssh.ts and index.ts
- Ensures consistency with documentation and reduces user confusion

Co-authored-by: danieltaox <danieltaox@gmail.com>

Author: cursoragent

src/lib/nodes/index.ts

@@ -71,13 +71,13 @@ $ sf nodes set my-node-name --max-price 12.50
 $ sf nodes extend my-node-name --duration 3600 --max-price 12.50
 
 \x1b[2m# SSH into a node's current VM\x1b[0m
-$ sf nodes ssh my-node-name
+$ sf nodes ssh root@my-node-name
 
 \x1b[2m# View logs from a node's current VM\x1b[0m
 $ sf nodes logs my-node-name
 
 \x1b[2m# SSH into a specific VM\x1b[0m
-$ sf nodes ssh user@vm_xxxxxxxxxxxxxxxxxxxxx
+$ sf nodes ssh root@vm_xxxxxxxxxxxxxxxxxxxxx
 
 \x1b[2m# View logs from a specific VM\x1b[0m
 $ sf nodes logs -i vm_xxxxxxxxxxxxxxxxxxxxx

src/lib/nodes/ssh.ts

@@ -36,16 +36,10 @@ const ssh = new Command("ssh")
 Examples:
 
   \x1b[2m# SSH into a node's current VM\x1b[0m
-  $ sf nodes ssh my-node
+  $ sf nodes ssh root@my-node
 
-  \x1b[2m# SSH with a specific username\x1b[0m
-  $ sf nodes ssh jenson@my-node
-
-  \x1b[2m# SSH directly to a VM ID\x1b[0m
-  $ sf nodes ssh vm_xxxxxxxxxxxxxxxxxxxxx
-
-  \x1b[2m# SSH with username to a VM ID\x1b[0m
-  $ sf nodes ssh huang@vm_xxxxxxxxxxxxxxxxxxxxx
+  \x1b[2m# SSH with a specific username to a VM ID\x1b[0m
+  $ sf nodes ssh root@vm_xxxxxxxxxxxxxxxxxxxxx
 `,
   )
   .action(async (destination, options) => {