Astro 5 update [Do not merge]

[GabrielaReyna]

Astro 5 update draft branch, please do not merge. Take this as a reference point for the actual update.

• All sites have been tested locally (landing pages and landing /docs). But further testing is needed.
• Main branch should be merged into this branch to get the latest updates from December.

Updates made:

• Upgraded to the newest version of Astro (V5), and with it bunch of astro helper dependencies and astro integration libraries including Astrojs/Svelte, Vite, Tailwind etc.
• It is important to notice that upgrading to Astro V5 is a major update with breaking changes and we should be cautions if we want to take this to production. Please see https://docs.astro.build/en/guides/upgrade-to/v5/

Further changes/awareness to make the new Astro version work with the current state of the repo

• With the V5 astro version also comes an upgrade in Vite (Vite6, it has its own migration guide in case with run into further related issues)
• Astro V5 removes Sqoosh Image service (I had to remove this service from astro config in all the sites)and since we are using PNPM I had to install SHARP so this dependency now performs the image service of the former Astro V4

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