Introduce `exact_line_breaks(count)` IR builder.
This produces a line element that prints exactly `count` line breaks, exempt from the printer's hardline collapsing / empty-line capping.
Blank runs inside verbatim values (YAML block/flow scalars, GraphQL block strings) are the value itself and must not be normalized.
Previously this was emulated by emitting raw `\n` text followed by a re-arming `hard_line_break()`..., hack.
Also removed the printer behavior that trims end of line whitespaces.
Fixes#20084, closes#20085
Currently, in the context of `js-in-vue`, there are 2 types of code paths:
- Script block: `run_full()`
- Converts a **string** formatted by `oxc_formatter` into Prettier's Doc format by splitting it into lines, joining with `hardline`
- Other cases: `run_fragment()`
- Converts the **IR** formatted by `oxc_formatter` into Prettier's Doc format through an IR -> Doc implementation
The current issue can be described as a bug in the former.
As a result of simply splitting by lines, newlines within strings (newlines within `TemplateLiteral`s) are also treated as `hardline` (which are affected by parent indentation, it should be `literalline`), causing the nesting to deepen with each format.
To fix this, the former code path now also goes through an IR -> Doc conversion process.
Additionally, by doing this, the `printWidth` is also handled correctly.
In #20085, which involves re-converting a formatted string into an AST and then traversing it, was deemed undesirable.
### Overview
Part of #16608
This PR applies `oxc_formatter` to the js-in-vue section.
However, it is not complete and is only applied to the following parts within js-in-vue:
- `script` block
- and `generic="..."`
- `v-for` LHS
- `v-slot`
In the `script` block, `external_callback` is used like a regular JS file, but it isn't for others.
TL;DR: Now you can use sort-imports for Vue files.
### Review points
The points I'd like to ask your review are the following:
- Addition of `format_node()` to `oxc_formatter`
- Made it possible to process any type that implements `Format`, not just `Program`
- The implementation of `js-in-vue` fragment was separated as much as possible to avoid impacting existing code
- `oxc_formatter` IR to prettier `Doc`
### TODOs
- [x] Planning
- [x] Implementation
- [x] Check benchmark
- [x] Check coverage
- [x] Understand & refactor
- [x] oxfmt: JS side
- [x] oxfmt: Rust side
- [x] oxfmt: to_doc.rs
- [x] oxc_formatter: fragment_format
- [x] Check benchmark again
- [x] Check coverage again
- [x] Check ecosystem-ci
- [x] Tests 👉🏻#19563
leaysgur