Add -LiteralPath parameter to Start-ThreadJob for cross-platform path handling

[jshigetomi]

Summary of the new feature / enhancement

Summary

Start-ThreadJob should support -LiteralPath parameter (with -PSPath and -LP aliases) to match Start-Job's functionality and handle cross-platform file paths that may contain wildcard characters.

Problem

PowerShell is now cross-platform, and characters traditionally used as wildcards (*, ?, [, ]) may be present in filenames on non-Windows systems (e.g., Linux, macOS). Currently, Start-ThreadJob only has a -FilePath parameter, which may cause issues when:

1. A legitimate filename contains wildcard characters on Unix-like systems
2. Users need to ensure paths are interpreted literally without pattern matching
3. Users want API consistency between Start-Job and Start-ThreadJob

Current Behavior

Start-ThreadJob only supports:

Start-ThreadJob -FilePath "path/to/script.ps1"

The -FilePath parameter rejects paths with wildcard characters (see GetScriptBlockFromFile method):

if (WildcardPattern.ContainsWildcardCharacters(filePath))
{
    throw new ArgumentException("FilePath cannot contain wildcards.");
}

Proposed technical implementation details (optional)

Proposed Solution

Add a -LiteralPath parameter to Start-ThreadJob with:

• Aliases: -PSPath, -LP (matching Start-Job)
• Behavior: Interprets paths literally without wildcard evaluation
• Mutual exclusivity: -FilePath and -LiteralPath should be in different parameter sets

Example usage:

# For a file literally named "test[1].ps1" on Linux
Start-ThreadJob -LiteralPath "/home/user/scripts/test[1].ps1"

# With aliases
Start-ThreadJob -PSPath "/home/user/scripts/test[1].ps1"
Start-ThreadJob -LP "/home/user/scripts/test[1].ps1"