Enable public application OIDC client support

This change uses oidc-client-ts to enable dashy to authenticate with as OIDC client. It populates the groups and roles so that it can be used the same as keycloak for showing/hiding elements on the dashboard.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dashy",
-  "version": "3.0.1",
+  "version": "3.1.0",
   "license": "MIT",
   "main": "server",
   "author": "Alicia Sykes <alicia@omg.lol> (https://aliciasykes.com)",
@@ -30,6 +30,7 @@
     "frappe-charts": "^1.6.2",
     "js-yaml": "^4.1.0",
     "keycloak-js": "^20.0.3",
+    "oidc-client-ts": "^3.0.1",
     "register-service-worker": "^1.7.2",
     "remedial": "^1.0.8",
     "rss-parser": "3.13.0",