fix(generator): decode path with ufo

[danielroe]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)

Description

Since unjs/ufo#32 (line) & is encoded (and is not decoded by decodeURI). This means that & in a path component is being preserved as %26 rather than decoded:

encodeURI('test & another test')
// "test%20&%20another%20test"
decodeURI('test%20%26%20another%20test')
// "test %26 another test"

This PR uses the decode function from ufo to ensure consistency between encoding/decoding. (url is normalised with ufo here)

resolves #9734

Checklist:

• All new and existing tests are passing.

[codecov-commenter]

Codecov Report

Merging #9739 (0c2f6e4) into dev (2ef0537) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##              dev    #9739   +/-   ##
=======================================
  Coverage   65.17%   65.17%           
=======================================
  Files          94       94           
  Lines        4109     4109           
  Branches     1127     1127           
=======================================
  Hits         2678     2678           
  Misses       1152     1152           
  Partials      279      279           

Flag	Coverage Δ
unittests	65.17% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/generator/src/generator.js	82.48% <0.00%> (ø)

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