Add dependency management to issue workflows

Updated skills and commands to identify and formally link issue
dependencies using tea CLI:

Skills updated:
- issue-writing: Document deps in description + link with tea CLI
- backlog-grooming: Check for formal dependency links in checklist
- roadmap-planning: Link dependencies after creating issues

Commands updated:
- create-issue: Ask about and link dependencies for new issues
- plan-issues: Create in dependency order, link with tea issues deps add
- groom: Check dependency status, suggest missing links

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

commands/create-issue.md

@@ -28,13 +28,16 @@ If title provided:
 1. Create an issue with that title
 2. Ask for description
 3. Assign to appropriate milestone (see above)
+4. Ask if this issue depends on any existing issues
+5. If dependencies exist, link them: `tea issues deps add <new-issue> <blocker>`
 
 ## Batch Mode
 
 If $1 is "batch":
 1. Ask user for the plan/direction
 2. Fetch available milestones
-3. Generate list of issues with titles, descriptions, and milestone assignments
+3. Generate list of issues with titles, descriptions, milestone assignments, and dependencies
 4. Show for approval
-5. Create each issue with milestone
-6. Display all created issue numbers
+5. Create each issue with milestone (in dependency order)
+6. Link dependencies between created issues: `tea issues deps add <issue> <blocker>`
+7. Display all created issue numbers with dependency graph