chore(nbd): add --json to all claude-md snippet examples [9344a5]

Ensures every command in the embedded snippet uses --json for structured
output, consistent with the guideline at the bottom of the snippet.

Also adds --json to nbd ready and nbd next, and --ftype md to the create
workflow step.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nbd/src/claude_md_snippet.md

@@ -14,34 +14,34 @@ Run once in the project root. Creates `.nbd/tickets/`. Safe to run multiple time
 
 ```sh
 # Create a new ticket (use --ftype md for a human-readable body)
-nbd create --title "Add OAuth login" --type feature --priority 7 --ftype md
+nbd create --title "Add OAuth login" --type feature --priority 7 --ftype md --json
 
 # List all open tickets (sorted by priority)
-nbd list
+nbd list --json
 
 # Read a specific ticket
-nbd read <id>
+nbd read <id> --json
 
 # Update a ticket
-nbd update <id> --status in_progress
+nbd update <id> --status in_progress --json
-nbd update <id> --status done
+nbd update <id> --status done --json
 ```
 
 ### Finding what to work on
 
 ```sh
 # All tickets that are unblocked and ready to start
-nbd ready
+nbd ready --json
 
 # The single highest-priority unblocked ticket
-nbd next
+nbd next --json
 ```
 
 ### Workflow
 
-1. **Before starting** — create a ticket: `nbd create --title "..." --json`
+1. **Before starting** — create a ticket: `nbd create --title "..." --ftype md --json`
-2. **When starting** — mark it in progress: `nbd update <id> --status in_progress`
+2. **When starting** — mark it in progress: `nbd update <id> --status in_progress --json`
-3. **When done** — mark it complete: `nbd update <id> --status done`
+3. **When done** — mark it complete: `nbd update <id> --status done --json`
 
 ### Guidelines