fix(dts): force emit dts for build-in vue loader

[Teages]

resolve #249

see https://github.com/nuxt-contrib/vue-sfc-transformer/pull/22 https://github.com/nuxt-contrib/vue-sfc-transformer/pull/20

The new build-in loader will skip dts generation for .vue files which is no need to transfrom, this caused a regression in issue #249

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 84.87%. Comparing base (9000888) to head (b0b56b5). :warning: Report is 107 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #301      +/-   ##
==========================================
+ Coverage   82.86%   84.87%   +2.01%     
==========================================
  Files          12       12              
  Lines         852      992     +140     
  Branches      133      204      +71     
==========================================
+ Hits          706      842     +136     
- Misses        144      149       +5     
+ Partials        2        1       -1     

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