force Vercel to rebuild sharp everytime - it's prone to breaking at some point and we'd have to clear the cache

Co-authored-by: Ben McCann <322311+benmccann@users.noreply.github.com>
Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>
Co-authored-by: gtmnayan <50981692+gtm-nayan@users.noreply.github.com>

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Co-authored-by: Ben McCann <322311+benmccann@users.noreply.github.com>

* Fix svelte.dev running locally instructions

After a clean clone, the `svelte` package needs to have its `/types`
directory generated for `pnpm dev` to work

* Update note about REPL

Firefox supports `import` in workers since version 114; confirmed that
the REPL works with `pnpm dev` in Firefox

html tags that could be optimized to use innerHTML in mount ignored any hydration code, which leads to everything getting unmounted and mounted again. This takes the non-optimized path for hydration, too.

fixes sveltejs/kit#10245

Runs type check as part of the CI. This needs a new path alias in the tsconfig so that TS resolves the svelte import in the ambient file directly to the correct d.ts file and doesn't load Svelte through the node_modules, at which point it would load the generated ambient type definitions and throw a duplicate definitions error.

Also removes a tgz that was accidentally added

- use shorter class property names as they are not minified
- reuse some dom helper methods

#8826

fixes #8879

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>