feat: add uConsole CM5 host configuration

- Add nixos-uconsole and nixos-hardware inputs for CM5/RPi5 support
- Create hosts/uconsole/configuration.nix with HAM radio, SDR, and security tools
- Create hosts/uconsole/hardware-configuration.nix for CM5 hardware
- Register uConsole in flake.nix nixosConfigurations
- Add uconsole host key placeholder to lib/keys.nix

hosts/uconsole/configuration.nix

@@ -1,57 +1,5 @@
 { config, lib, pkgs, paths, self, keys, inputs, ... }:
 
-let
-  # Reticulum Network Stack - build from PyPI
-  reticulum = pkgs.python3Packages.buildPythonPackage {
-    pname = "reticulum";
-    version = "0.7.0";
-    format = "pyproject";
-    src = pkgs.python3Packages.fetchPypi {
-      pname = "reticulum";
-      version = "0.7.0";
-      hash = "sha256-Yku40tRpQh22m4HX142cU/VevHAEfgHZicKFOyp1U/o=";
-    };
-  };
-
-  # NomadNet - Reticulum browser/messaging
-  nomadnet = pkgs.python3Packages.buildPythonPackage {
-    pname = "nomadnet";
-    version = "0.5.2";
-    format = "pyproject";
-    src = pkgs.python3Packages.fetchPypi {
-      pname = "nomadnet";
-      version = "0.5.2";
-      hash = "sha256-WP4IrlKLzFP0U8/00mOo8D9Jp2ubr6Q0peKbw401Nhw=";
-    };
-    propagatedBuildInputs = [ reticulum ];
-  };
-
-  # LXMF - Lightweight Mesh Exchange Protocol
-  lxmf = pkgs.python3Packages.buildPythonPackage {
-    pname = "lxmf";
-    version = "0.5.1";
-    format = "pyproject";
-    src = pkgs.python3Packages.fetchPypi {
-      pname = "lxmf";
-      version = "0.5.1";
-      hash = "sha256-2zwTgG283qx1Bt6TKaGJtcwPr2tCNOOIASu8RXC/QLE=";
-    };
-    propagatedBuildInputs = [ reticulum ];
-  };
-
-  # Sidechannel - Visual UI for Reticulum
-  sidechannel = pkgs.python3Packages.buildPythonPackage {
-    pname = "sidechannel";
-    version = "0.1.0";
-    format = "pyproject";
-    src = pkgs.python3Packages.fetchPypi {
-      pname = "sidechannel";
-      version = "0.1.0";
-      hash = "sha256-0000000000000000000000000000000000000000000=";
-    };
-    propagatedBuildInputs = [ reticulum ];
-  };
-in
 {
   # --- CORE HARDWARE (CM5 / RPi5) ---
   imports = [
@@ -147,10 +95,10 @@ in
 
     # LORA, MESH & RETICULUM
     meshtastic      # CLI tools for Meshtastic nodes
-    reticulum       # The RNS stack (rnsd, rnsh) - built from PyPI
+    reticulum-network-stack # The RNS stack (rnsd, rnsh)
     nomadnet        # Reticulum browser/messaging
     lxmf            # Lightweight Mesh Exchange Protocol
-    sidechannel     # Visual UI for Reticulum communication
+    sidechannel-rns # Visual UI for Reticulum communication
 
     # HACKING & SECURITY (Kali-like suite)
     nmap            # Port scanning