Update TypeScript and Vite, use Vitest for tests

[mrxz]

This PR updates several of the devDependencies, mainly motivated by the goal of updating TypeScript, where the other changes followed naturally:

• TypeScript updated to version 7.0.2
• Newer version of Vite required for TypeScript 7
• Updated version of vite-plugin-glsl needed for Vite 7+ support
• vite-plugin-dts can be made to work, but effectively requires including TS 6.X as well, instead replaced with native tsc
• ts-node does not work with TypeScript 7.0.2 (ts-node doesn't work with Typescript 7.0.2 TypeStrong/ts-node#2174), replaced with Vitest for unit tests

Removing vite-plugin-dts has several benefits, as it turns out this was a good chunk of the build time (~90%), additionally it was performed for both dev and production builds. The output of tsc is near identical, only differing in things like used quotes and order of properties/types (see mrxz@5383545).

Adding Vitest to replace the ts-node based "test runner" is up for debate. I do think a proper testing framework makes sense over raw node asserts, but it doesn't have to be Vitest. Given Vite is already used though, it is a natural choice IMHO.

[oscarlorentzon]

Looks good overall, and Vitest is a reasonable choice with Vite already in use.

[dmarcos]

Thanks!