feat: stable root cache

[louisgv]

Details

This PR stabilizes the root render mechanism for page runtime within the template provided by Plasmo. This will fix HMR for page runtime in general.

It also:

• Update all dependencies to the latest (except for sharp see hotfix: sharp library version #375 )
• Align parcel-bundler behavior with the upstream implementation
• Fix up dependency, use lightningcss instead of parcel/css
• Added meta tag for viewport:
  • https://discord.com/channels/946290204443025438/1064416920494940190/1064437918980112437
• fix [RFC] Clean up cache when it gets too big #357
• Breaking change: container root renamed it from root -> __plasmo.
• Breaking change: Svelte root is now under a root div instead of document.body, similar to other frameworks <- this is intended for the future svelte portal.

Code of Conduct

• I agree to follow this project's Code of Conduct
• I checked the current PR for duplication.

[louisgv]

Need to dig deeper still... The HMR fetching works on first try, but by the 2nd-3rd, it became flaky and not applying update at all despite the code payload reflecting the latest code. Need to debug the hydrated code and see what the HMR are looking at.

[ColdSauce]

side comment: would be interesting to have a graphviz view of how the bundling works. maybe a future hackathon idea?

[ColdSauce]

Added a whole bunch of comments. No glaring issues. Suggested code quality improvements.

/SHIP/