Add npm run up-deps and update deps to latest (Vite 5=>6, Svelte, etc) (#150)

## Summary

Due to some of our odd issues (out of memory, etc) I thought it would be
helpful to be on the latest Vite and Svelte versions.

I also added `npm run up-deps` similar to pnpm PR but leveraging
[npm-check-updates](https://github.com/raineorshine/npm-check-updates)
package to make bumping versions easier (and interactive).

This updates all dependencies except `bits-ui` (0.21.16 => 0.22.0) and
`svelte-radix` (1.1.1 => 2.0.1) which are used by shadcn-svelte. They
are probably safe to update (especially bits-ui) but would require more
visual validation.

I had to add a `vite` override as some internal deps of `vitest` were
still requesting `vite@5` (and oddly this isn't an issue when using
`pnpm` as I have a similar vite 6 setup on other repos.

## Checklist
- [ ] Added Unit Tests
- [ ] Covered by existing CI
- [ ] Integration tested
- [ ] Documentation update
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
	- Added a new script for dependency management.

- **Updates**
- Multiple package versions updated to enhance performance and
compatibility, including key libraries such as Svelte, Playwright, and
TypeScript.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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Co-authored-by: Sean Lynch <[email protected]>

Author: sean-zlai