feat: change it to use modern AST, if svelte v5 is installed

[ota-meshi]

This PR will be changed to also use Svelte v5's modern AST.
I believe this has performance benefits as it allows we to skip the transformation step to legacy AST.

[changeset-bot]

🦋 Changeset detected

Latest commit: 2eea457

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
svelte-eslint-parser	Minor

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[coveralls]

Pull Request Test Coverage Report for Build 8127822619

Details

• 348 of 376 (92.55%) changed or added relevant lines in 12 files are covered.
• 12 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-1.1%) to 90.55%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/context/index.ts	8	9	88.89%
src/parser/converts/element.ts	67	68	98.53%
src/parser/index.ts	1	2	50.0%
src/parser/converts/block.ts	56	59	94.92%
src/parser/html.ts	110	118	93.22%
src/parser/compat.ts	63	77	81.82%

Files with Coverage Reduction	New Missed Lines	%
src/context/index.ts	1	93.12%
src/parser/converts/attr.ts	3	90.05%
src/parser/converts/element.ts	8	92.21%

Totals
Change from base Build 8127758942:	-1.1%
Covered Lines:	2773
Relevant Lines:	2954

---

💛 - Coveralls

[ota-meshi]

Hmm. I still don't know the correct way to get the <svelte:options> AST.

[baseballyama]

I think it's better to merge this after stable Svelte 5 is released?

[ota-meshi]

I would like to improve the way to get the AST node of <svelte:options> if possible, but I don't think it is necessary to wait for the release of Svelte v5.

#437 (comment)

[baseballyama]

MEMO: {@const} tag's AST will be change by sveltejs/svelte#9609.

[niemyjski]

svelte 5 is already included in cli tooling so would be good to have this.