fix: package type declarations

[jwindhager]

No description provided.

[Copilot]

Pull request overview

This PR updates the build/publish setup to generate and expose TypeScript declaration files for the omezarr-tilesource package, and adjusts exports/types to make the OpenSeadragon augmentation type available to consumers.

Changes:

• Add Vite type generation via unplugin-dts for library builds and publish types metadata from package.json.
• Switch TypeScript config from noEmit to emitting declaration-only output into a separate ./build directory.
• Export OMEZarrTileSourceClass and re-export it from the library entrypoint.

Reviewed changes

Copilot reviewed 6 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
vite.config.ts	Adds unplugin-dts to generate bundled .d.ts during library builds.
tsconfig.json	Enables declaration-only emits and configures output paths for emitted types/build info.
src/OMEZarrTileSource.ts	Exports OMEZarrTileSourceClass type so it can be re-exported/published.
src/main.ts	Adjusts entrypoint exports and keeps runtime enable() behavior.
package.json	Publishes types entry and updates build scripts/deps for declaration generation.
pnpm-lock.yaml	Locks newly added dev dependencies (unplugin-dts, @microsoft/api-extractor).
package-lock.json	Removed (project is pnpm-only).
eslint.config.js	Ignores new build/ output directory.
.prettierignore	Ignores new build/ output directory.
.gitignore	Ignores new build/ output directory.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (ae20234) to head (03bd377).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

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##   main   #7   +/-   ##
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