ToSemanticString should always return 3-component version string

[Copilot]

Version.ToSemanticString() could return a 2-component string (e.g. "1.2") when the Build component was unset, violating the semantic versioning requirement of always having major.minor.patch.

Changes

• VersionExtensions.cs: Append .0 when Build < 0, ensuring a minimum of 3 components
• VersionExtensionsTests.cs: Update expectation for new Version(1, 2) from "1.2" → "1.2.0"

new Version(1, 2).ToSemanticString()    // was "1.2", now "1.2.0"
new Version(1, 2, 3).ToSemanticString() // unchanged: "1.2.3"

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.51%. Comparing base (3c1e3f1) to head (582d8e5).
⚠️ Report is 1 commits behind head on prime.

Additional details and impacted files

@@            Coverage Diff             @@
##            prime      #94      +/-   ##
==========================================
+ Coverage   86.36%   86.51%   +0.15%     
==========================================
  Files          78       78              
  Lines        1393     1409      +16     
  Branches      239      242       +3     
==========================================
+ Hits         1203     1219      +16     
  Misses        137      137              
  Partials       53       53              

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[Copilot]

Pull request overview

This PR adjusts Version.ToSemanticString() to always output at least three numeric components (major.minor.patch) by converting new Version(major, minor) from "major.minor" to "major.minor.0", aligning output with semantic-version expectations.

Changes:

• Ensure ToSemanticString() appends ".0" when Version.Build is unset (Build < 0).
• Update the corresponding unit test expectation for new Version(1, 2) to "1.2.0".

Reviewed changes

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

File	Description
PowerKit/Extensions/VersionExtensions.cs	Ensures at least 3 components by appending .0 when the build/patch component is missing.
PowerKit.Tests/Extensions/VersionExtensionsTests.cs	Updates expected string output for new Version(1, 2) to match the new behavior.

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