refactor(config): alias export to generate

[pi0]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

As of the new nuxt export command, it makes sense using export in nuxt.config. This alias is a backport from Nuxt3. After defaults getting applied, we keep the same references so any modifications to each, update another one

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[codecov-commenter]

Codecov Report

Merging #7399 into dev will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev    #7399      +/-   ##
==========================================
+ Coverage   70.19%   70.21%   +0.02%     
==========================================
  Files          88       88              
  Lines        3670     3673       +3     
  Branches     1000     1001       +1     
==========================================
+ Hits         2576     2579       +3     
  Misses        887      887              
  Partials      207      207              

Flag	Coverage Δ
#unittests	70.21% <100.00%> (+0.02%)	⬆️

Impacted Files	Coverage Δ
packages/config/src/options.js	97.66% <100.00%> (+0.03%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e9a4ca6...883cc02. Read the comment docs.