test: add more test cases for pathToFileURL

[RafaelGSS]

Just to make sure we won't introduce any regression anytime further (based on H1 reports we received).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.03%. Comparing base (c24e552) to head (875c813).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #63293      +/-   ##
==========================================
- Coverage   90.05%   90.03%   -0.02%     
==========================================
  Files         714      714              
  Lines      225247   225247              
  Branches    42578    42573       -5     
==========================================
- Hits       202842   202804      -38     
- Misses      14181    14229      +48     
+ Partials     8224     8214      -10     

see 39 files with indirect coverage changes

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[aduh95]

According to https://url.spec.whatwg.org/#host-miscellaneous, there are a few more forbidden char we might as well check for:

Suggested change

	const forbiddenHostnameChars = [
	'\\\\exa mple\\share\\file.txt',
	'\\\\host name\\share\\file.txt', // space
	'\\\\host#name\\share\\file.txt', // hash
	'\\\\host?name\\share\\file.txt', // question mark
	'\\\\host@name\\share\\file.txt', // at sign
	'\\\\host:name\\share\\file.txt', // colon
	'\\\\host/name\\share\\file.txt', // forward slash
	'\\\\host[name\\share\\file.txt', // left bracket
	'\\\\host]name\\share\\file.txt', // right bracket
	];
	const forbiddenHostnameChars = Array.from('\0\t\n\r #:<>?@[]^|', (sep) => `\\\\host${sep}name\\share\\file.txt`);

But it looks like \n, \r, \t are ignored instead of being rejected; # and ? might have a special significant in UNC not sure

[aduh95]

I've opened ada-url/ada#1142 to address the # and ? cases