fix: reject non-semver candidate versions in isVersionSatisfies

[sproctor]

Distributions like JetBrains Runtime publish 4-segment versions such as '17.0.8.1+1080.1' that the semver package rejects. Both compareBuild and satisfies throw on these, which surfaced to users as "Error: Invalid Version: 17.0.8.1+1080.1" and aborted the whole install when any available version was non-semver. Guard with an early semver.valid check so unparseable versions are treated as a non-match.

Description:
rejects invalid semver java versions rather than throwing an error. Allow valid java versions in a list with invalid versions to be used (specifically the JBR version mentioned above)

Related issue:
#1008

Check list:

• Mark if documentation changes are required.
• Mark if tests were added or updated to cover the changes.

[Copilot]

Pull request overview

This PR prevents isVersionSatisfies from throwing when a distribution returns a candidate Java version string that is not valid SemVer (e.g., JetBrains Runtime 4-segment versions like 17.0.8.1+1080.1). Instead, invalid candidate versions are treated as “not a match”, allowing the installer to continue and select other valid versions.

Changes:

• Added an early semver.valid(version) guard in isVersionSatisfies to return false for unparseable candidate versions (avoids compareBuild / satisfies exceptions).
• Updated compiled dist bundles to include the same guard.
• Added Jest coverage to ensure invalid candidate versions are rejected (and don’t abort selection).

Reviewed changes

Copilot reviewed 2 out of 4 changed files in this pull request and generated no comments.

File	Description
src/util.ts	Adds early SemVer validity check for candidate versions to avoid throwing during version filtering.
dist/setup/index.js	Updates compiled action bundle with the same defensive guard.
dist/cleanup/index.js	Updates compiled cleanup bundle with the same defensive guard.
__tests__/util.test.ts	Adds tests covering invalid (4-segment) candidate versions to ensure they’re treated as non-matches.

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