feat(storage): default data storage for node and dev presets

[pi0]

🔗 Linked issue

❓ 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

The storage interface from useStorage is by default all in memory. In order to write stateful KV logic, users therefore require to configure storage mountpoints.

This PR adds a default data mountpoint using fs driver for all node based presets and development mode. (only if not configured by user) This way data will be persisted in .data/kv by default only for data: .

export default eventHandler(async (event) => {
  const kvStorage = useStorage("data");
  const counter = (Number(await kvStorage.getItem("counter")) || 0) + 1;
  await kvStorage.setItem("counter", counter);
  return {
    counter,
  };
});

Next steps:

• Support auto config storage for other worker presets when env/binding exits
• Document this feature + .data dir and gitignore
• Use data storage for cache as well (or consider persisting .nitro/.nuxt partially)

📝 Checklist

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

[codecov]

Codecov Report

Merging #1352 (486172e) into main (a915422) will decrease coverage by 0.28%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1352      +/-   ##
==========================================
- Coverage   76.68%   76.40%   -0.28%     
==========================================
  Files          70       70              
  Lines        7162     7179      +17     
  Branches      710      710              
==========================================
- Hits         5492     5485       -7     
- Misses       1669     1693      +24     
  Partials        1        1              

Impacted Files	Coverage Δ
src/options.ts	94.65% <100.00%> (+0.21%)	⬆️

... and 2 files with indirect coverage changes

[4F2E4A2E]

Could this be related? Default Persistent Data Storage Import is broken nuxt/nuxt#23484