fix(vite, webpack): generate composable keys based on order

[danielroe]

🔗 Linked issue

resolves nuxt/nuxt#14442

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Introduced in #4955, we were creating hashed based on code index. But this differs between server + client for vue components (among others) due to differences in the code generated in the two environments. However, I think the order of keyed composables is more solid and likely to remain fixed between client/server.

Other approaches I also tried:

1. using sourcemaps to get original LOC - I think the best approach conceptually. This did not match however (1 line out), surprisingly, due to a bug (I think) in vite's vue plugin - I'll need to investigate further and report. Additionally, we don't yet have isomorphic support for sourcemaps in unplugin (expose sourcemap utilities via this context unjs/unplugin#146) so it would add some complexity for webpack.

2. moving the key generation 'up' to earlier in the pipeline (via enforce: pre). Also much more reliable as an approach. This would work except that acorn can't handle TS. I could add an additional esbuild transform in before parsing with acorn, but it felt like this would be too heavy.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

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[pi0]

Nice approach!