WIP: Route chunks

[markdalgleish]

#11571

TODO:

• Wire up to Vite plugin.
• Handle TSX.
• Ignore types in dependency analysis.
• HMR
• Caching
• Refactor getRouteChunks into singular getRouteChunk to improve performance/caching
• Ensure all route chunks are preloaded
• Split shared import statements
• Handle import side effects
• Handle export { foo, bar }
• Handle export { foo, bar as baz } from "./module"
• Handle export * from "./module"
• Handle export {}
• Handle export const foo = ..., bar = ...;
• Handle export const { foo } = ...; etc.
• Harden export dependency analysis
• Ensure consumers importing a route module doesn't result in duplicate code
• Allow shared imports across chunks
• Integration tests
• Ensure HMR can handle addition of main chunk
• Fix unused import removal in omitChunkedExports now that shared imports don't de-opt
• Ensure chunked exports download first
• Strict mode (build breaks on de-opt)
• Changeset
• Docs
• Tidy HMR snippets when route chunks disabled?
• Skip route chunk build entries when future flag disabled?
• Clean empty route chunks from build output?

[changeset-bot]

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Latest commit: 2012d2f

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