feat: add little-rascal laptop configuration and deployment

- Add complete NixOS configuration for little-rascal laptop
- Include Niri window manager and CLI-focused setup
- Add hardware configuration for laptop hardware
- Include deployment script for little-rascal
- Update flake.nix to include little-rascal as build target
- Add deploy-rs configuration for little-rascal deployment

The little-rascal laptop is now fully integrated into the Home Lab
infrastructure with complete NixOS configuration management.

flake.lock

@@ -54,11 +54,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1750776420,
-        "narHash": "sha256-/CG+w0o0oJ5itVklOoLbdn2dGB0wbZVOoDm4np6w09A=",
+        "lastModified": 1751011381,
+        "narHash": "sha256-krGXKxvkBhnrSC/kGBmg5MyupUUT5R6IBCLEzx9jhMM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "30a61f056ac492e3b7cdcb69c1e6abdcf00e39cf",
+        "rev": "30e2e2857ba47844aa71991daa6ed1fc678bcbb7",
         "type": "github"
       },
       "original": {
@@ -70,11 +70,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1750838302,
-        "narHash": "sha256-aVkL3/yu50oQzi2YuKo0ceiCypVZpZXYd2P2p1FMJM4=",
+        "lastModified": 1750969886,
+        "narHash": "sha256-zW/OFnotiz/ndPFdebpo3X0CrbVNf22n4DjN2vxlb58=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "7284e2decc982b81a296ab35aa46e804baaa1cfe",
+        "rev": "a676066377a2fe7457369dd37c31fd2263b662f4",
         "type": "github"
       },
       "original": {