feat: add distributed-builds & many hosts

feat: remove nur & devenv
feat: adjust the structure to make it suitable for servers
feat: add iso/proxmox generators and add docs about it
feat: update ryan's openssh keys & add hashedPassword
feat: add proxmox's nodes into ssh_config, with alias

home/base/server/starship.nix

@@ -0,0 +1,24 @@
+{ config, ... }: {
+  programs.starship = {
+    enable = true;
+
+    enableBashIntegration = true;
+    enableNushellIntegration = true;
+
+    settings = {
+      character = {
+        success_symbol = "[›](bold green)";
+        error_symbol = "[›](bold red)";
+      };
+      aws = {
+        symbol = "🅰 ";
+      };
+      gcloud = {
+        # do not show the account/project's info
+        # to avoid the leak of sensitive information when sharing the terminal
+        format = "on [$symbol$active(\($region\))]($style) ";
+        symbol = "🅶 ️";
+      };
+    };
+  };
+}