TOOLS: Handle several issue related to running scripts on Windows

[MotoLegacy]

Description of Changes

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1. Windows does not allow * in paths on disk full-stop. This meant that checking out the assets repository on Windows would fail due to water textures using this pattern. The workaround employed is to use $ in place of the asterisk, then during build copy away to /tmp/ on the docker container and restore the asterisk where Windows will not see it and complain. Added a test case to check for these asterisks too.
2. Map compilation will no longer fail because TrenchBroom uses Windows backslashes to refer back to WAD paths by default. The map will be overwritten on build to swap to forward slashes only in the wad key. Added a test case to check for these too. Fixes Toolbox doesn't accept \ in WAD Directory #125

Visual Sample

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N/A (see builds)

Checklist

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• I have thoroughly tested my changes to the best of my ability
• I confirm I have not contributed anything that would impact Nazi Zombies: Portable's licensing and usage
• This Pull Request fixes a critical issue that should be reviewed and merged as soon as possible