chore(build): migrate build system from rollup and parcel to vite

[jboix]

Description

Replaces Rollup and Parcel with Vite as the sole build tool in order to reduce complexity. The changes involve:

Changes made

• Removed .parcelrc and rollup.config.js, as their functionalities are now handled by Vite.
• Introduced multiple Vite config to support the various build outputs previously managed by Rollup.
• Updated package.json to integrate Vite dependencies and remove those related to Rollup and Parcel (2 Rollup plugins have been retained, including Babel to enhance browser compatibility and Terser for minifying the UMD build).
• Modified scss/pillarbox.scss to enhance compatibility with the new Vite build setup. This update includes simplifying SCSS imports, making it easier to resolve external dependencies without depending on the file's location.
• The server previously started by Parcel for the demo pages is now efficiently handled by Vite's native development server.

[github-actions[bot]]

PR Preview Action v1.4.7 :---: :rocket: Deployed preview to https://SRGSSR.github.io/pillarbox-web/pr-preview/pr-252/ on branch gh-pages at 2024-06-10 08:08 UTC

[github-actions[bot]]

Coverage report

St.:grey_question:	Category	Percentage	Covered / Total
🟢	Statements	98.72%	617/625
🟢	Branches	95.74%	292/305
🟢	Functions	99.43%	173/174
🟢	Lines	99.15%	581/586

Test suite run success

199 tests passing in 9 suites.

Report generated by 🧪jest coverage report action from 7670192e4e0de6b7c48410525f0c36bec858a4e6