Support nonce and acr with OIDC + other improvements and tests (#883)

* Introduces new configuration variables for OIDC:
  - GRIST_OIDC_IDP_ENABLED_PROTECTIONS
  - GRIST_OIDC_IDP_ACR_VALUES
  - GRIST_OIDC_IDP_EXTRA_CLIENT_METADATA
* Implements all supported protections in oidc/Protections.ts
* Includes a better error page for failed OIDC logins
* Includes some other improvements, e.g. to logging, to OIDC
* Adds a large unit test for OIDCConfig
* Adds support for SERVER_NODE_OPTIONS for running tests
* Adds to documentation/develop.md info about GREP_TESTS, VERBOSE, and SERVER_NODE_OPTIONS.

static/locales/en.server.json

@@ -1,5 +1,8 @@
 {
   "sendAppPage": {
     "Loading": "Loading"
+  },
+  "oidc": {
+    "emailNotVerifiedError": "Please verify your email with the identity provider, and log in again."
   }
 }