Windows CLI MCP Server

# directoryValidator - **should return valid for directories within allowed paths** – validates that directories contained in the allowed list are accepted. - **should return invalid for directories outside allowed paths** – checks that directories outside the whitelist are reported as invalid. - **should handle a mix of valid and invalid directories** – ensures that only the directories outside the allowed paths are listed as invalid. - **should handle GitBash style paths** – confirms that Unix-style paths like `/c/Users/...` are normalized and validated correctly. - **should consider invalid paths that throw during normalization** – tests that paths causing normalization errors are treated as invalid. - **should not throw for valid directories** – verifies that the throwing validator passes silently when all directories are allowed. - **should throw McpError for invalid directories** – checks that a custom error is thrown when invalid directories are found. - **should include invalid directories in error message** – ensures the thrown error lists each offending directory and allowed paths for clarity. - **should use singular wording for a single invalid directory** – tests that the error message uses singular phrasing when only one directory is invalid. - **should handle empty directories array** – confirms that validating an empty list of directories succeeds. - **should handle empty allowed paths array** – ensures that an empty allowed path configuration results in an error when validating directories.