Support two slash queries

[znck]

Same as https://github.com/orta/vscode-twoslash-queries but in .vue files

[codecov-commenter]

Codecov Report

Merging #298 (046aa64) into main (210b8be) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #298      +/-   ##
==========================================
- Coverage   42.06%   42.05%   -0.01%     
==========================================
  Files         161      161              
  Lines       19994    19994              
  Branches     1215     1213       -2     
==========================================
- Hits         8411     8409       -2     
- Misses      11583    11585       +2     

Impacted Files	Coverage Δ
packages/shared/src/rpc/handlers.ts	97.42% <0.00%> (-0.52%)	⬇️

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