feat(reusable-claude): add plugins, plugin_marketplaces, and additional_permissions inputs

[laurigates]

Summary

The reusable-claude.yml workflow only accepts runner, claude_args, and max_turns inputs. Repos that need plugins and custom tool permissions (like claude-plugins) cannot use it as a caller.

Missing inputs

Input	Type	Description
plugins	string	Claude Code plugins to load
plugin_marketplaces	string	Plugin marketplace URLs
additional_permissions	string	Additional tool permissions beyond the defaults

These already exist in reusable-claude-review.yml — the same pattern should be applied to reusable-claude.yml.

Context

The claude-plugins repo's claude.yml workflow loads 21 plugins and grants broad tool permissions (Read, Write, Edit, git operations, gh CLI). It cannot migrate to the reusable workflow until these inputs are available.

Example caller after fix

jobs:
  claude:
    uses: laurigates/.github/.github/workflows/reusable-claude.yml@main
    secrets:
      CLAUDE_CODE_OAUTH_TOKEN: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
    with:
      plugins: |
        code-quality-plugin@laurigates-claude-plugins
        testing-plugin@laurigates-claude-plugins
      plugin_marketplaces: |
        https://github.com/laurigates/claude-plugins.git
      additional_permissions: |
        Write
        Edit
        Bash(git add *)
        Bash(git commit *)
        Bash(git push *)