Output source map from vite plugin

[yume-chan]

Fixes #236

This makes browser DevTools show the original source code as the author writes, not the code produced by this plugin.

This can be verified by either checking browser DevTools or using the vite-plugin-inspect plugin to log each plugins' output code and source maps.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 0bc8d67730417bed0bc8cc57d4d2ac74ab72986f

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

This PR includes changesets to release 3 packages

| Name | Type | | ------------------------- | ----- | | solid-devtools | Minor | | @solid-devtools/extension | Minor | | @solid-devtools/overlay | Minor |

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[thetarnav]

Thank you!