fix(css): track dependencies from addWatchFile for HMR

[bluwy]

Description

This PR moves the module-graph/HMR handling code in the cssPlugin, to a new cssAnalysisPlugin, which is placed at the end like import analysis. This way this.addWatchFile calls from plugins that transform the CSS will work and update appropriately.

This is helpful for SFC files like Vue/Svelte/Astro where the file is internally transformed into JS that imports the scoped CSS virtual module. And since they already pre-processed the CSS with dependencies, they can assign those dependencies to the CSS virtual modules directly. Today, the only workaround is to add the dependencies to the SFC file, which isn't accurate.

Additional context

Working on improving Astro's CSS HMR: withastro/astro#9370 😬

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines, especially the Pull Request Guidelines.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Update the corresponding documentation if needed.
• Ideally, include relevant tests that fail without this PR but pass with it.

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[patak-dev]

Sounds good to me, and it makes things easier to follow to, nice one!

[patak-dev]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI on 9d0c7e0: Open

suite	result	latest scheduled
analogjs	✅ success	✅ success
astro	✅ success	✅ success
histoire	❌ failure	❌ failure
ladle	✅ success	✅ success
laravel	❌ failure	❌ failure
marko	✅ success	✅ success
nuxt	✅ success	✅ success
nx	✅ success	✅ success
previewjs	✅ success	✅ success
qwik	❌ failure	✅ success
rakkas	✅ success	✅ success
sveltekit	✅ success	✅ success
unocss	❌ failure	❌ failure
vike	❌ failure	❌ failure
vite-plugin-pwa	✅ success	✅ success
vite-plugin-react	✅ success	✅ success
vite-plugin-react-pages	✅ success	✅ success
vite-plugin-react-swc	✅ success	✅ success
vite-plugin-svelte	✅ success	✅ success
vite-plugin-vue	✅ success	✅ success
vite-setup-catalogue	✅ success	✅ success
vitepress	❌ failure	❌ failure
vitest	✅ success	❌ failure

[patak-dev]

The qwik issue seems unrelated. I'll leave the PR unmerged until tomorrow in case someone else want to check it out.