chore: Restructured infra modules

infra/modules/dev/variables.tf

@@ -0,0 +1,44 @@
+variable "server_type" {
+  description = "Server type for dev (Gitea + Runner)."
+  type        = string
+}
+
+variable "image" {
+  description = "OS image used for the server."
+  type        = string
+}
+
+variable "location" {
+  description = "Hetzner Cloud datacenter location."
+  type        = string
+}
+
+variable "ssh_key_id" {
+  description = "ID of the Hetzner Cloud SSH key to install on the server."
+  type        = string
+}
+
+variable "network_id" {
+  description = "ID of the private network to attach dev to."
+  type        = string
+}
+
+variable "private_ip" {
+  description = "Private network IP for dev."
+  type        = string
+}
+
+variable "volume_size" {
+  description = "Size in GB of the volume attached to dev (disk2 in docs/architecture.md)."
+  type        = number
+}
+
+variable "allowed_ssh_source_ips" {
+  description = "CIDRs allowed to reach port 22 on dev."
+  type        = list(string)
+}
+
+variable "network_ip_range" {
+  description = "CIDR of the private network, allowed through the firewall for traffic from prod."
+  type        = string
+}