Add paragraph-level list formatting support to Google Docs

Enhanced the update_paragraph_style tool to support creating bulleted and
numbered lists with nested indentation levels (0-8). This enables agents to
create well-structured documents that match professional document styles.

Changes:
- Enhanced update_paragraph_style tool with:
  - create_list parameter: Create bulleted (UNORDERED) or numbered (ORDERED) lists
  - list_nesting_level parameter: Support nested list items (0-8 levels)
- Updated create_bullet_list_request helper to accept nesting_level parameter
- Updated documentation in README.md, docs/README.md, and docs/README_NEW.md
- Tool remains in Extended tier as defined in tool_tiers.yaml

This addresses the feature request to expose paragraph-level formatting
operations (named styles, bullets, indentation) that were previously missing
from the character-level modify_doc_text tool.

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

README.md

@@ -912,7 +912,7 @@ attachments=[{
 | `find_and_replace_doc` | Extended | Find and replace text |
 | `list_docs_in_folder` | Extended | List docs in folder |
 | `insert_doc_elements` | Extended | Add tables, lists, page breaks |
-| `update_paragraph_style` | Extended | Apply heading styles (H1-H6) and paragraph formatting |
+| `update_paragraph_style` | Extended | Apply heading styles, lists (bulleted/numbered with nesting), and paragraph formatting |
 | `insert_doc_image` | Complete | Insert images from Drive/URLs |
 | `update_doc_headers_footers` | Complete | Modify headers and footers |
 | `batch_update_doc` | Complete | Execute multiple operations |