refactor(home): move host home-manager configs out of hosts

hosts/12kingdoms-shoukei/home.nix

@@ -1,14 +0,0 @@
-{ config, ... }:
-let
-  hostName = "shoukei"; # Define your hostname.
-  mkSymlink = config.lib.file.mkOutOfStoreSymlink;
-in
-{
-  programs.ssh.matchBlocks."github.com".identityFile =
-    "${config.home.homeDirectory}/.ssh/${hostName}";
-
-  modules.desktop.nvidia.enable = false;
-
-  xdg.configFile."niri/niri-hardware.kdl".source =
-    mkSymlink "${config.home.homeDirectory}/nix-config/hosts/12kingdoms-shoukei/niri-hardware.kdl";
-}

hosts/README.md

@@ -79,7 +79,8 @@ configurations follow similar patterns but are customized for specific hardware
    1. Create a new folder under `hosts/` with the name of the new host.
    2. Create & add the new host's `hardware-configuration.nix` to the new folder, and add the new
       host's `configuration.nix` to `hosts/<name>/default.nix`.
-   3. If the new host need to use home-manager, add its custom config into `hosts/<name>/home.nix`.
+   3. If the new host need to use home-manager, add its custom config into
+      `home/linux/hosts/<name>.nix` or `home/darwin/hosts/<name>.nix`.
 1. Under `outputs/`
    1. Add a new nix file named `outputs/<system-architecture>/src/<name>.nix`.
    2. Copy the content from one of the existing similar host, and modify it to fit the new host.

hosts/darwin-fern/home.nix

@@ -1,8 +0,0 @@
-{ config, ... }:
-let
-  hostName = "fern";
-in
-{
-  programs.ssh.matchBlocks."github.com".identityFile =
-    "${config.home.homeDirectory}/.ssh/${hostName}";
-}

hosts/darwin-frieren/home.nix

@@ -1,8 +0,0 @@
-{ config, ... }:
-let
-  hostName = "frieren";
-in
-{
-  programs.ssh.matchBlocks."github.com".identityFile =
-    "${config.home.homeDirectory}/.ssh/${hostName}";
-}

hosts/idols-ai/home.nix

@@ -1,12 +0,0 @@
-{ config, ... }:
-let
-  mkSymlink = config.lib.file.mkOutOfStoreSymlink;
-in
-{
-  programs.ssh.matchBlocks."github.com".identityFile = "${config.home.homeDirectory}/.ssh/idols-ai";
-
-  modules.desktop.nvidia.enable = true;
-
-  xdg.configFile."niri/niri-hardware.kdl".source =
-    mkSymlink "${config.home.homeDirectory}/nix-config/hosts/idols-ai/niri-hardware.kdl";
-}

hosts/idols-kana/home.nix

@@ -1,3 +0,0 @@
-{
-  imports = [ ../idols-ruby/home.nix ];
-}

hosts/idols-ruby/home.nix

@@ -1,21 +0,0 @@
-{
-  programs.gh.enable = true;
-  programs.git.enable = true;
-
-  programs.zellij.enable = true;
-  programs.bash.enable = true;
-  programs.nushell.enable = true;
-
-  programs.starship = {
-    enable = true;
-    enableBashIntegration = true;
-    enableNushellIntegration = true;
-  };
-  programs.neovim = {
-    enable = true;
-    viAlias = true;
-    vimAlias = true;
-  };
-
-  home.stateVersion = "25.11";
-}