feat(ql3): establish 3.0 incubation baseline

packages/ql3-runtime-core/src/versioning/pinnedSemver.ts

@@ -0,0 +1,21 @@
+export interface PinnedSemverApi {
+  compare(left: string, right: string): number;
+  satisfies(
+    version: string,
+    range: string,
+    options?: Readonly<{ includePrerelease: boolean }>,
+  ): boolean;
+  valid(value: string): string | null;
+  validRange(value: string): string | null;
+}
+
+let loadedSemver: PinnedSemverApi | undefined;
+
+/**
+ * Returns the production-pinned SemVer implementation without making its
+ * DefinitelyTyped package part of every QingLong 3.0 builder closure.
+ */
+export function semver(): PinnedSemverApi {
+  loadedSemver ??= require('semver') as PinnedSemverApi;
+  return loadedSemver;
+}