fix(javascript): centralize module syntax and separate erased type dependencies

src/domain/javascript/javascriptModuleSpecifier.ts

@@ -0,0 +1,6 @@
+/** Relative module syntax differs from an arbitrary dot-prefixed filename. */
+export const isRelativeJavaScriptModuleSpecifier = (value: string): boolean =>
+  value === "." ||
+  value === ".." ||
+  value.startsWith("./") ||
+  value.startsWith("../");