feat(rome_v8): implement a wrapper for the V8 runtime

[leops]

Summary

This branch implements a prototype wrapper for the V8 JavaScript runtime, and exposes various syntax tree-related APIs to the JS environment: SyntaxNodes and SyntaxTokens, all AST node classes, and BatchMutations. These Rust functions and data structures are exposed to JS through a mix of hand written code and auto-generated "glue" code layer (this glue code is itself generated either from manually authored WebIDL files for individual rome crates, or directly from the grammar files for AST node).

For now the usage of this wrapper layer is limited as an example to running codemods through a dedicate CLI binary under crates/rome_v8/examples/codemod.rs. This binary can be run using cargo codemod --script <script> <INPUT...>: it expects the --script argument to be a JavaScript module declaring a single function as its default export. This function will be executed once for each JS file found in the inputs (using the same filesystem visitor logic as the main CLI) with the root syntax node of the file as an argument, and is expected to return either a syntax node or a batch mutation object. In either case the returned syntax tree is printed back to a string and saved back to the original file.

Test Plan

The wrapper currently only has a single, simple test for the codemod use case.

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Playground for commit 3139fb5

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Parser conformance results on ubuntu-latest

js/262

Test result	main count	This PR count	Difference
Total	48863	48863	0
Passed	47810	47810	0
Failed	1053	1053	0
Panics	0	0	0
Coverage	97.84%	97.84%	0.00%

jsx/babel

Test result	main count	This PR count	Difference
Total	40	40	0
Passed	37	37	0
Failed	3	3	0
Panics	0	0	0
Coverage	92.50%	92.50%	0.00%

symbols/microsoft

Test result	main count	This PR count	Difference
Total	6212	6212	0
Passed	1764	1764	0
Failed	4448	4448	0
Panics	0	0	0
Coverage	28.40%	28.40%	0.00%

ts/babel

Test result	main count	This PR count	Difference
Total	639	639	0
Passed	573	573	0
Failed	66	66	0
Panics	0	0	0
Coverage	89.67%	89.67%	0.00%

ts/microsoft

Test result	main count	This PR count	Difference
Total	17224	17224	0
Passed	13121	13121	0
Failed	4103	4103	0
Panics	0	0	0
Coverage	76.18%	76.18%	0.00%

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This PR is stale because it has been open 14 days with no activity.

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