feat: expose plugins and presets on SwaggerUI global symbol (#9189)

Part of this commit is also:
- complete plugins consolidation
- complete presets consolidation
- build system consolidation

Refs #9188

test/components/highlight-code.jsx

@@ -1,7 +1,7 @@
 import React from "react"
 import expect from "expect"
 import { shallow } from "enzyme"
-import HighlightCode from "components/highlight-code"
+import HighlightCode from "core/components/highlight-code"
 
 const fakeGetConfigs = () => ({syntaxHighlight: {activated: true, theme: "agate"}})
 

test/components/response-body.jsx

@@ -1,7 +1,7 @@
 import React from "react"
 import expect from "expect"
 import { shallow } from "enzyme"
-import ResponseBody from "components/response-body"
+import ResponseBody from "core/components/response-body"
 
 describe("<ResponseBody />", function() {
   const highlightCodeComponent = () => null