test: add semver and gateway helpers coverage

apps/macos/Tests/ClawdisIPCTests/SemverTests.swift

@@ -0,0 +1,21 @@
+import Testing
+@testable import Clawdis
+
+@Suite struct SemverTests {
+    @Test func comparisonOrdersByMajorMinorPatch() {
+        let a = Semver(major: 1, minor: 0, patch: 0)
+        let b = Semver(major: 1, minor: 1, patch: 0)
+        let c = Semver(major: 1, minor: 1, patch: 1)
+        let d = Semver(major: 2, minor: 0, patch: 0)
+
+        #expect(a < b)
+        #expect(b < c)
+        #expect(c < d)
+        #expect(d > a)
+    }
+
+    @Test func descriptionMatchesParts() {
+        let v = Semver(major: 3, minor: 2, patch: 1)
+        #expect(v.description == "3.2.1")
+    }
+}