Svelte: migrate svelte.x to sveltekit.x

[pascalgrimaud]

• fix Svelte : broken build #1836

[codecov]

Codecov Report

Merging #1837 (bc6bb24) into main (e3b8e8e) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##                main     #1837   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity      1845      1845           
===========================================
  Files            394       394           
  Lines           6928      6928           
  Branches         154       154           
===========================================
  Hits            6928      6928           

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