fix(worktrees): use full paths for bundled scripts

Users were confused by ./scripts/ references, thinking they needed to copy
scripts into their project. Scripts are in ~/.claude/skills/worktrees/scripts/
and should be referenced with full paths.

Changes:
- Updated spawn-issues to use full script paths
- Updated worktrees skill with full paths in all examples
- Fixed gitea model name to claude-haiku-4-5
- Added tools list to issue-worker agent

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

skills/gitea/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: gitea
-model: haiku
+model: claude-haiku-4-5
 description: View, create, and manage Gitea issues and pull requests using tea CLI. Use when working with issues, PRs, viewing issue details, creating pull requests, adding comments, merging PRs, or when the user mentions tea, gitea, issue numbers, or PR numbers.
 user-invocable: false
 ---