Add initial Terraform module structure for firewall and network

- Created main.tf, output.tf, and variables.tf for the firewall module.
- Created main.tf, output.tf, and variables.tf for the network module.
- Added provider configuration for Hetzner Cloud and NetBox in provider.tf.
- Defined sensitive variables for Hetzner API token, NetBox URL, and NetBox API token in variables.tf.

terraform/.terraform.lock.hcl

@@ -0,0 +1,39 @@
+# This file is maintained automatically by "terraform init".
+# Manual edits may be lost in future updates.
+
+provider "registry.terraform.io/e-breuninger/netbox" {
+  version     = "5.0.0"
+  constraints = "5.0.0"
+  hashes = [
+    "h1:+EQEyf7E240dsEX5EQmEcIBFiroHg1ifciwjYKzGmnI=",
+    "zh:06b65249c1dfd7ee329c5f867ea6ded971258a66c1846427aeee3d186f68faa6",
+    "zh:0a779110713699ee5b71bf7da2ad51cebe23c69af666d41fa067691e7861cef0",
+    "zh:2f85f5b08e569d5b9ab43201d2f5b1d324d1c3fdf6c6f3db5cf74285be357add",
+    "zh:43bf58446e32717e406a9f3f0b560e6d285daa643a55430a22f4f44c26bd60c5",
+    "zh:605a2153f3e0f1066043b970ff8eb47eb3f9f1b4f5f977de08c0f4c477b797a6",
+    "zh:85900aa75ef026fc717ef6884adf588b4980c9794f27a66a9473d50ff11f700a",
+    "zh:9eded54924f051ec2c5da900397e5c50da10f4879400ef7912bfb7cd367a1b8e",
+    "zh:b58f310391dd9d2739d72da8184fb8c0ee133b47cde6ff16fac6778a1c5fb9be",
+  ]
+}
+
+provider "registry.terraform.io/hetznercloud/hcloud" {
+  version     = "1.57.0"
+  constraints = "1.57.0"
+  hashes = [
+    "h1:3L7tShwvc84Pq3x++t/eUOCpRj56+0zz0xXLSL0MzmM=",
+    "zh:016ecc39328f34f6c0ffa413598f354824f7878c89cd031f123edb4bc8a687a2",
+    "zh:10b362dc0847200c987214b129b5f85e2f7d8ad417261a1d2dd04ab74de15603",
+    "zh:194647d9a61dca4f411f44580316b88a11095d7a99679d445f9b0f2c1ba976c4",
+    "zh:1d8aafe2ce7890696385bb3a0c3286e7ee3020416d337f59935406e4c6f91de6",
+    "zh:594585616210fb232fad4ebda2387ecd3f483931e00eff988fca83add6ce7cfc",
+    "zh:65e50be33ffb85580546f119839e1293591cc6d4db729d809931d0408b6ae408",
+    "zh:7d4ed5bd8c477ec304142e2160203a76a0d09c93d224950bda253172b2571038",
+    "zh:90a70a70a266b78c8216903e711904e6969b3957d182602b5d788602ec9ef323",
+    "zh:abb8e28e96fb8de270995873de980896b7cb53cfc550f02c50eaa42884624ba9",
+    "zh:bbf34dca2de6e105ca7204222162a0402d8e9e9a28e1de5ffbaa2c0d6270a059",
+    "zh:c1a9edb693d632dcb5c3c9ee84c97138e08eadb9354e28592efd581f68ac0385",
+    "zh:dadbf1368fae314fe8dcb99ebefbc78409f3fc0e3808cd92ea573b8eee1cae98",
+    "zh:e713e00ca27348abd18da2eeff861905e84050e3e7e008f14a0c63c70ab2ff84",
+  ]
+}