Introduce `injectStylesAs` config for html plugin

[edoardocavazza]

This PR introduces a injectStylesAs configuration to set the inject behavior for CSS imports in JavaScript modules.

It should fix #172

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: b190cf1c538ebb28c5e7c8184f8208eac7c43aae

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

This PR includes changesets to release 1 package

| Name | Type | | ---------------------------- | ----- | | @chialab/esbuild-plugin-html | Patch |

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 90.19608% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 75.78%. Comparing base (623f59f) to head (b190cf1).

Files	Patch %	Lines
packages/esbuild-plugin-html/lib/collectScripts.js	80.00%	0 Missing and 4 partials :warning:
packages/esbuild-plugin-html/lib/index.js	96.00%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #176 +/- ## ========================================== + Coverage 75.70% 75.78% +0.07% ========================================== Files 28 28 Lines 5034 5067 +33 Branches 776 780 +4 ========================================== + Hits 3811 3840 +29 Misses 467 467 - Partials 756 760 +4 ```

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[benjamingwynn]

Thank you for your hard work @edoardocavazza !

This is required for CSS in Svelte files loaded via esbuild-svelte to not cause a flash of unstyled content.

Until this PR is merged I've isolated eslint-plugin-html with this patch into a drop-in replacement.