feat: Setup Unit Test Environment and Refactor Typescript Config (#365)

* modify tsconfig and set up unit tests

* generate .d.ts files

* setup project dependencies and configuration for unit tests

* Add test setup and layout-test-utils along with first spec

* Add paths back to tsconfig

* remove type=module from package.json

* Add typescript definition for .env

* update package-lock

client/babel.config.cjs

@@ -0,0 +1,23 @@
+module.exports = {
+  presets: [
+    ["@babel/preset-env", { "targets": { "node": "current" } }], //compiling ES2015+ syntax
+    ['@babel/preset-react', {runtime: 'automatic'}],
+    "@babel/preset-typescript"
+  ],
+  /*
+      Babel's code transformations are enabled by applying plugins (or presets) to your configuration file.
+  */
+  plugins: [
+    "@babel/plugin-transform-runtime",
+    'babel-plugin-transform-import-meta',
+    'babel-plugin-transform-vite-meta-env',
+    'babel-plugin-replace-ts-export-assignment',
+    [
+      "babel-plugin-root-import",
+      {
+        "rootPathPrefix": "~/",
+        "rootPathSuffix": "./src"
+      }
+    ]
+  ]
+}