Place the runtime JS files beside the template files

So that we can remove @ts-ignore hacks in the template files.

Author: kateinoigakukun

Diff for: Makefile

@@ -39,4 +39,6 @@ perf-tester:
 .PHONY: regenerate_swiftpm_resources
 regenerate_swiftpm_resources:
 	npm run build
-	cp Runtime/lib/index.js Runtime/lib/index.mjs Runtime/lib/index.d.ts Sources/JavaScriptKit/Runtime
+	cp Runtime/lib/index.js Plugins/PackageToJS/Templates/runtime.js
+	cp Runtime/lib/index.mjs Plugins/PackageToJS/Templates/runtime.mjs
+	cp Runtime/lib/index.d.ts Plugins/PackageToJS/Templates/runtime.d.ts