fix: Address snapshot parsing in new versioning system

[Dario-Maselli]

This pull request updates the handling and testing of Minecraft's new version numbering system, specifically for snapshot versions. The main changes include improving the parsing logic for snapshot versions and expanding the test coverage to include new snapshot version formats.

Improvements to version parsing:

• Updated the snapshot version parsing in MinecraftVersion.java to use split("-snapshot-", 2), ensuring only the first occurrence is split and preventing issues with versions containing multiple -snapshot- substrings. Also, changed the default value for the release field from null to an empty string for consistency.

Test coverage enhancements:

• Added new snapshot versions (26.3-snapshot-2, 26.3-snapshot-1) to the versions array in VersionList.java to ensure the new parsing logic is properly tested.

[Copilot]

Pull request overview

This PR updates MinecraftVersion parsing to better support Minecraft’s new numeric versioning scheme for snapshot builds, and extends the regression test version list to include newer snapshot versions.

Changes:

• Adjust snapshot parsing for the new versioning scheme by splitting on -snapshot- with a limit and using an empty string instead of null for the revision field.
• Extend the test version manifest to include 26.3-snapshot-1 and 26.3-snapshot-2.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/main/java/net/minecraftforge/srgutils/MinecraftVersion.java	Updates parsing logic for new-system snapshot versions.
src/test/java/net/minecraftforge/srgutils/test/VersionList.java	Adds newer snapshot versions to the parsing/sorting regression list.

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[LexManos]

Not sure why copilot poked his head in here.
But ya, wrote the snapshot one without testing as snapshots didn't exist at the time.
Missed the NPE, thanks.