Move stubs from ./stubs to ./shared/Stubs

Gathers all shared test code in single place.

tests/unit/shared/Stubs/LanguageSyntaxStub.ts

@@ -0,0 +1,17 @@
+import { ILanguageSyntax } from '@/domain/ScriptCode';
+
+export class LanguageSyntaxStub implements ILanguageSyntax {
+  public commentDelimiters = [];
+
+  public commonCodeParts = [];
+
+  public withCommentDelimiters(...delimiters: string[]) {
+    this.commentDelimiters = delimiters;
+    return this;
+  }
+
+  public withCommonCodeParts(...codeParts: string[]) {
+    this.commonCodeParts = codeParts;
+    return this;
+  }
+}