feat(sheets): add text wrapping, alignment, and font formatting to format_sheet_range

Extends format_sheet_range with new parameters:
- wrap_strategy: WRAP, CLIP, OVERFLOW_CELL
- horizontal_alignment: LEFT, CENTER, RIGHT
- vertical_alignment: TOP, MIDDLE, BOTTOM
- bold: boolean for bold text
- italic: boolean for italic text
- font_size: integer for font size in points

All parameters work alongside existing color and number format options.
Includes 21 unit tests covering all new functionality.
Added to extended tier in tool_tiers.yaml.

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

README_NEW.md

@@ -121,8 +121,8 @@ export OAUTHLIB_INSECURE_TRANSPORT=1  # Development only
 | `create_spreadsheet` | Core | Create new spreadsheets with multiple sheets |
 | `list_spreadsheets` | Extended | List accessible spreadsheets |
 | `get_spreadsheet_info` | Extended | Get metadata, sheets, conditional formats |
+| `format_sheet_range` | Extended | Apply colors, number formats, text wrapping, alignment, bold/italic, font size |
 | `create_sheet` | Complete | Add sheets to existing spreadsheets |
-| `format_sheet_range` | Complete | Apply colors and number formats |
 | `add_conditional_formatting` | Complete | Add boolean or gradient rules |
 | `update_conditional_formatting` | Complete | Modify existing rules |
 | `delete_conditional_formatting` | Complete | Remove formatting rules |