Centralize Tensamin packages modules and release automation

modules/default.nix

@@ -0,0 +1,21 @@
+{ self }:
+let
+  components = {
+    iota = import ./iota.nix { inherit self; };
+    omikron = import ./server.nix {
+      inherit self;
+      name = "omikron";
+    };
+    omega = import ./server.nix {
+      inherit self;
+      name = "omega";
+    };
+    client = import ./client.nix { inherit self; };
+  };
+in
+components
+// {
+  default = {
+    imports = builtins.attrValues components;
+  };
+}