Remove ~/.local/bin/qs wrapper script, use quickshell directly

- Removed qs script creation from home-manager.nix activation
- Updated quickshell-reset.sh to not create qs script
- Updated comments to reflect direct quickshell usage
- Fixes exec-once timing issues by eliminating wrapper script

flake.lock

@@ -36,24 +36,11 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1749285348,
-        "narHash": "sha256-frdhQvPbmDYaScPFiCnfdh3B/Vh81Uuoo0w5TkWmmjU=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "3e3afe5174c561dee0df6f2c2b2236990146329f",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-unstable",
-        "type": "indirect"
-      }
-    },
     "quickshell": {
       "inputs": {
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": [
+          "nixpkgs"
+        ]
       },
       "locked": {
         "lastModified": 1753595452,