fix: unicode path html entry point (#5821)

[yArna]

Description

fixes #5821

Does not work when the path to the entry point has Unicode characters，will cause a 404 error

such as Chinese character folders，when accessing the entry page in the browser at development time

├── 中文
│   └── index.html
└── にほんご
    └── index.html

this PR use decodeURIComponent() to handle the received file path

Additional context

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[patak-dev]

Thanks for the PR @yArna and the clear repro and linked issue! Would it be possible to add a test case in one of the playgrounds to the PR so we avoid future regressions? There is info about extending Vite's e2e test suite here https://github.com/vitejs/vite/blob/main/CONTRIBUTING.md#extending-the-test-suite

[yArna]

Thanks for the PR @yArna and the clear repro and linked issue! Would it be possible to add a test case in one of the playgrounds to the PR so we avoid future regressions? There is info about extending Vite's e2e test suite here https://github.com/vitejs/vite/blob/main/CONTRIBUTING.md#extending-the-test-suite

Okay, I'll add it later.

[patak-dev]

Nice! Thanks for adding the test case too

[yArna]

Glad to contribute to this project 🥳