take the TS source code off of @openid/appauth and compile it manually so that we can make it into a proper esmodule

src/Umbraco.Web.UI.Client/package.json

@@ -88,6 +88,7 @@
 		"./webhook": "./dist-cms/packages/webhook/index.js",
 		"./workspace": "./dist-cms/packages/core/workspace/index.js",
 		"./external/backend-api": "./dist-cms/external/backend-api/index.js",
+		"./external/base64-js": "./dist-cms/external/base64-js/index.js",
 		"./external/dompurify": "./dist-cms/external/dompurify/index.js",
 		"./external/lit": "./dist-cms/external/lit/index.js",
 		"./external/marked": "./dist-cms/external/marked/index.js",
@@ -162,11 +163,11 @@
 		"npm": ">=10.1 < 11"
 	},
 	"dependencies": {
-		"@openid/appauth": "^1.3.1",
 		"@types/dompurify": "^3.0.5",
 		"@types/uuid": "^9.0.8",
 		"@umbraco-ui/uui": "1.7.2",
 		"@umbraco-ui/uui-css": "1.7.2",
+		"base64-js": "^1.5.1",
 		"dompurify": "^3.0.9",
 		"element-internals-polyfill": "^1.3.10",
 		"lit": "^3.1.2",
@@ -197,10 +198,10 @@
 		"@types/mocha": "^10.0.1",
 		"@typescript-eslint/eslint-plugin": "^6.14.0",
 		"@typescript-eslint/parser": "^7.1.0",
-		"@web/dev-server-esbuild": "^1.0.1",
+		"@web/dev-server-esbuild": "^1.0.2",
 		"@web/dev-server-import-maps": "^0.2.0",
 		"@web/dev-server-rollup": "^0.6.1",
-		"@web/test-runner": "^0.18.0",
+		"@web/test-runner": "^0.18.1",
 		"@web/test-runner-playwright": "^0.11.0",
 		"babel-loader": "^9.1.3",
 		"eslint": "^8.56.0",
@@ -221,12 +222,12 @@
 		"react": "^18.2.0",
 		"react-dom": "^18.2.0",
 		"remark-gfm": "^3.0.1",
-		"rollup": "^4.12.0",
-		"rollup-plugin-esbuild": "^6.1.0",
-		"rollup-plugin-import-css": "^3.4.0",
+		"rollup": "^4.14.1",
+		"rollup-plugin-esbuild": "^6.1.1",
+		"rollup-plugin-import-css": "^3.5.0",
 		"rollup-plugin-web-worker-loader": "^1.6.1",
-		"storybook": "^7.6.17",
 		"simple-icons": "^11.11.0",
+		"storybook": "^7.6.17",
 		"tiny-glob": "^0.2.9",
 		"tsc-alias": "^1.8.8",
 		"typedoc": "^0.25.10",