fix(service): add appsettings for the yt01 environment (#1329)

<!--- Provide a general summary of your changes in the Title above -->

## Description

<!--- Describe your changes in detail -->

## Related Issue(s)

- #1258

## Verification

- [ ] **Your** code builds clean without any errors or warnings
- [ ] Manual testing done (required)
- [ ] Relevant automated test added (if you find this hard, leave it and
we'll help out)

## Documentation

- [ ] Documentation is updated (either in `docs`-directory, Altinnpedia
or a separate linked PR in
[altinn-studio-docs.](https://github.com/Altinn/altinn-studio-docs), if
applicable)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Introduced a new configuration file for the Dialogporten service,
centralizing important settings for infrastructure and application
components.
- **Documentation**
- Added placeholders for sensitive information to enhance security
practices.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: arealmaas

src/Digdir.Domain.Dialogporten.Service/appsettings.yt01.json

@@ -0,0 +1,47 @@
+{
+  "Infrastructure": {
+    "MassTransit": {
+      "Host": "TODO: Add to local secrets"
+    },
+    "Redis": {
+      "ConnectionString": "TODO: Add to local secrets"
+    },
+    "DialogDbConnectionString": "TODO: Add to local secrets",
+    // Settings from appsettings.json, environment variables or other configuration providers.
+    // The first three are always mandatory for all client definitions types
+    "Maskinporten": {
+      // 1. Valid values are test and prod
+      "Environment": "test",
+      // 2. Client Id/integration as configured in Maskinporten
+      "ClientId": "TODO: Add to local secrets",
+      // 3. Scope(s) requested, space seperated. Must be provisioned on supplied client id.
+      "Scope": "altinn:events.publish altinn:events.publish.admin altinn:register/partylookup.admin altinn:authorization/authorize.admin altinn:accessmanagement/authorizedparties.admin",
+      // --------------------------
+      // Any additional settings are specific for the selected client definition type.
+      // See below for examples using other types.
+      "EncodedJwk": "TODO: Add to local secrets"
+    },
+    "Altinn": {
+      "BaseUri": "https://platform.yt01.altinn.cloud/",
+      "EventsBaseUri": "https://platform.yt01.altinn.cloud/",
+      "SubscriptionKey": "TODO: Add to local secrets"
+    }
+  },
+  "Application": {
+    "Dialogporten": {
+      "BaseUri": "https://platform.yt01.altinn.cloud/dialogporten",
+      "Ed25519KeyPairs": {
+        "Primary": {
+          "Kid": "TODO: Add to local secrets",
+          "PrivateComponent": "TODO: Add to local secrets",
+          "PublicComponent": "TODO: Add to local secrets"
+        },
+        "Secondary": {
+          "Kid": "TODO: Add to local secrets",
+          "PrivateComponent": "TODO: Add to local secrets",
+          "PublicComponent": "TODO: Add to local secrets"
+        }
+      }
+    }
+  }
+}