Add Gitea and Mail modules with configuration and resources

- Created Gitea module with outputs, provider, and variables for deployment.
- Implemented Mail module including configuration for Dovecot and Postfix, along with necessary resources such as secrets, config maps, and deployments.
- Added Python script for bcrypt password hashing and integrated it into the Mail module.
- Defined persistent volumes and claims for Seafile module, along with Nginx configuration for serving content.
- Established necessary variables for all modules to ensure flexibility and configurability.

terraform/modules/mail/outputs.tf

@@ -0,0 +1,11 @@
+output "path" {
+  value = local.mail_path
+}
+
+output "namespace" {
+  value = kubernetes_namespace.mail.metadata[0].name
+}
+
+output "app_name" {
+  value = "mail"
+}