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Parses a version string into a Version object.
The provided version string should follow the semantic versioning format (major.minor.patch) with an optional qualifier for alpha or beta releases. For example, "1.0.0", "1.0.0-alpha1", or "1.0.0-beta2".
Return
A Version object representing the parsed version, or null if the provided string is not a valid version format.
Parameters
versionString
The version string to parse.