Merge infra and k3 into one directory again

Since I don't have multiple terraform steps anymore it simply doesn't
make sense to me anymore to split all tasks into separate folders.
Instead I try to be as clear as possible in the README to make it easy
to follow the structure in the future without too much headache.

modules/hetzner/dns/main.tf

@@ -0,0 +1,25 @@
+resource "hetznerdns_zone" "this" {
+  name = var.zone
+  ttl  = var.zone_ttl
+}
+
+locals {
+  records = nonsensitive({
+    for record in var.records : "${record.type}#${record.name}#${md5(record.value)}" => {
+      for key, value in record : key => value
+    }
+  })
+}
+
+resource "hetznerdns_record" "this" {
+  for_each = local.records
+  zone_id  = hetznerdns_zone.this.id
+  name     = each.value.name
+  type     = each.value.type
+  value = (each.value.type == "TXT"
+    ? "\"${join("\" \"", [for c in chunklist(split("", each.value.value), 255) : join("", c)])}\""
+    : each.value.value
+  )
+  ttl = each.value.ttl
+}
+