feat: add gcp/azure storage documentation (#145)

## Summary by Sourcery

Documentation:
- Document GCP and Azure storage options. Update links to refer to "S3
Compatible Storage" instead of "S3 Storage".

Author: insider89

docs/launch-platform/self-hosted/installation-guide/platform-installation.md

@@ -110,7 +110,7 @@ features:
       domain:
         hostname: '<your-domain>'
     state:
-      s3ConnectionUrl: 's3://<bucket-name>?region=<region>'
+      connectionUrl: 's3://<bucket-name>?region=<region>'
       secretsProvider: 'passphrase'
       credentials:
         encryptionKey: '<your-encryption-key>'
@@ -374,14 +374,32 @@ features:
       domain:
         hostname: 'example.company.com'
     state:
-      s3ConnectionUrl: 's3://example-bucket?region=us-east-1'
+      connectionUrl: 's3-compatible-endpoint-url'
       secretsProvider: 'passphrase'
       credentials:
         encryptionKey: 'abc123encryption456key789example000key'
         aws:
           accessKeyId: 'EXAMPLEKEYID123456'
           secretAccessKey: 'abc123example456secret789key000aws'
           region: 'us-east-1'
+        azure:
+          storageAccount: 'example-storage-account'
+          storageKey: 'abc123example456key789key000azure'
+        google:
+          project: 'example-project-id'
+          credentials: |
+            {
+              "type": "service_account",
+              "project_id": "your-project",
+              "private_key_id": "key-id",
+              "private_key": "-----BEGIN PRIVATE KEY-----\n...\n-----END PRIVATE KEY-----\n",
+              "client_email": "service-account@project.iam.gserviceaccount.com",
+              "client_id": "client-id",
+              "auth_uri": "https://accounts.google.com/o/oauth2/auth",
+              "token_uri": "https://oauth2.googleapis.com/token",
+              "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
+              "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/service-account@project.iam.gserviceaccount.com"
+            }
     targets:
       - id: 'example'
         name: 'Example Cluster'

docs/launch-platform/self-hosted/installation-guide/prerequisites/overview.md

@@ -75,7 +75,7 @@ Make sure to complete **all** prerequisites before proceeding with the platform
 
 - Platform assets storage
 - Blockchain data persistence
-- [Setup Guide](/documentation/docs/launch-platform/self-hosted/installation-guide/prerequisites/s3-storage)
+- [Setup Guide](/documentation/docs/launch-platform/self-hosted/installation-guide/prerequisites/s3-compatible-storage)
 
 #### HashiCorp Vault
 

docs/launch-platform/self-hosted/installation-guide/prerequisites/redis.md

@@ -174,7 +174,7 @@ Common issues and solutions:
 
 1. ✅ Set up Redis instance
 2. ✅ Configure security settings
-3. ➡️ Proceed to [S3 Storage Setup](/documentation/docs/launch-platform/self-hosted/installation-guide/prerequisites/s3-storage)
+3. ➡️ Proceed to [S3 Compatible Storage Setup](/documentation/docs/launch-platform/self-hosted/installation-guide/prerequisites/s3-compatible-storage)
 
 :::tip Need Help?
 Contact [support@settlemint.com](mailto:support@settlemint.com) if you encounter any issues.