feat: import public non-asset URL

[sapphi-red]

Description

Add support for import '/foo.json?url' (foo.json is in public directory) and improve errors for importing .json in public directory.

	behavior after this PR	behavior before this PR
import foo from '/public/foo.json'	warning (foo is the content of foo.json)	warning (foo is the content of foo.json)
import foo from '/public/foo.json?url'	warning (foo is the URL of foo.json)	warning (foo is the URL of foo.json)
import foo from '/foo.json'	error	error
import foo from '/foo.json?url'	no error (foo is the URL of foo.json)	error

close #13284

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 PR Title 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.

[bolt-new-by-stackblitz]

Run & review this pull request in StackBlitz Codeflow.