feat(rome_js_formatter): variable declarator formatting

[denbezrukov]

Summary

This PR partially implements #2423

Prev PR with discussion: #2737

current:
File Based Average Prettier Similarity: 76.28%
Line Based Average Prettier Similarity: 70.99%

main:
File Based Average Prettier Similarity: 75.24%
Line Based Average Prettier Similarity: 70.33%

This PR adds

• OnlyLeft layout to the list of layouts. This layout is hit, usually, when variable declarator doesn't have initializer.
• New conditional branch for should_break_left_hand_side when variable declaration has_complex_type_annotation. Prettier hasComplexTypeAnnotation.
• New conditional branch for should_not_indent_if_parent_indents. Don't indent if great_parent is JS_VARIABLE_DECLARATOR.

Test Plan

Add new tests specs

[ematipico]

That's great! Could you add the compatibility numbers?

You'd need to run

REPORT_PRETTIER=1 cargo test

And copy the lines at the bottom of the file report.md.

It will be something like

**File Based Average Prettier Similarity**: 75.24%  
**Line Based Average Prettier Similarity**: 70.33%  

On this PR and main (both updated) so we can see how much we got closer!

[denbezrukov]

current:
File Based Average Prettier Similarity: 76.28%
Line Based Average Prettier Similarity: 70.99%

main:
File Based Average Prettier Similarity: 75.24%
Line Based Average Prettier Similarity: 70.33%