feat(types)!: use Component type for type definitions

[metonym]

Related: carbon-design-system/carbon-icons-svelte#203

Currently, the generated type definitions use SvelteComponentTyped with declare class ... for icon type definitions.

• SvelteComponentTyped was deprecated in Svelte 4 and will be removed in a future major Svelte release.
• declare class is no longer valid in Svelte 5 since components are no longer classes.

This PR implements the following:

• Replace SvelteComponentTyped with the officially recommended Component utility type exported by Svelte.

Breaking Changes

• TypeScript definitions are no longer compatible with Svelte 3. Note that the library will still work with Svelte 3; only types will be broken.
  • You will experience the following TypeScript error: Argument of type 'Component<CarbonPictogramProps, {}, string>' is not assignable to parameter of type 'ConstructorOfATypedSvelteComponent'.
  • This is likely an acceptable trade-off since the last Svelte 3 version was published two years ago. However, the latest Svelte 3 still (expectedly) has a high number of weekly downloads. This is acceptable since the upgrade path is relatively smooth; simply upgrading to Svelte 4 would resolve the type errors As of this writing:
  • Svelte 5: ~200k weekly downloads.
  • Svelte 4: ~100k
  • Svelte 3: ~100k
• Exported CarbonIcon class is removed.
• Exported CarbonIconProps type is preserved, but the underlying type has been reworked to properly extend SVG "rest props".

Additional Notes

• Interestingly, usage of ComponentProps<typeof Icon> does not work as expected in Svelte 4. This indicates the value in preserving the exported CarbonIconProps type.
• This library is compatible with Svelte 5 but cannot be used in Runes-only mode since it still uses $$restProps to forward props down to the underlying svg element.