Refactor msp to modules (#3214)

* feat: refactor everything to modules

* fix: a lot of circular deps fixes

* feat: use vitest instead of karma

vite.config.js

@@ -0,0 +1,13 @@
+/// <reference types="vitest" />
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+    test: {
+        // NOTE: this is a replacement location for karma tests.
+        //       moving forward we should colocate tests with the
+        //       code they test.
+        include: ['test/**/*.test.{js,mjs,cjs}'],
+        environment: 'jsdom',
+        setupFiles: ['test/setup.js'],
+    },
+});