fix: correctly handle readonly directories during delete

[vbreuss]

This PR fixes handling of readonly directories during delete operations to properly match Windows behavior. The fix ensures that attempting to delete a readonly directory on Windows throws an IOException with the correct error message and path information.

Key changes:

• Add test coverage for readonly directory deletion behavior
• Fix the exception thrown when accessing readonly directories to include the full path

---

• Fixes Bug try deleting a Readonly directory from MockFileSystem dosn't throw any exception #853

[Copilot]

Pull Request Overview

This PR fixes handling of readonly directories during delete operations to properly match Windows behavior. The fix ensures that attempting to delete a readonly directory on Windows throws an IOException with the correct error message and path information.

Key changes:

• Add test coverage for readonly directory deletion behavior
• Fix the exception thrown when accessing readonly directories to include the full path

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
Tests/Testably.Abstractions.Tests/FileSystem/DirectoryInfo/DeleteTests.cs	Adds test case for deleting readonly directories with Windows-specific behavior validation
Tests/Testably.Abstractions.Tests/FileSystem/Directory/DeleteTests.cs	Adds test case for deleting readonly directories via Directory.Delete method
Source/Testably.Abstractions.Testing/Storage/InMemoryStorage.cs	Updates delete operation to properly handle metadata errors for readonly directories
Source/Testably.Abstractions.Testing/Storage/InMemoryContainer.cs	Fixes exception to include the full path when access is denied to readonly directories

[github-actions]

Test Results

    37 files  ± 0      37 suites  ±0   20m 40s ⏱️ -18s
44 195 tests +65  41 764 ✅ +63  2 429 💤 ±0  2 ❌ +2 
85 920 runs  +64  76 887 ✅ +62  9 031 💤 ±0  2 ❌ +2 

For more details on these failures, see this check.

Results for commit 4da05d4. ± Comparison against base commit f764c5c.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
83.3% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

This is addressed in release v4.3.5.