Make server dotfiles generic: single servers/ folder instead of per-host

Consolidated server/<host>/ into one generic servers/ set applied to any
host. Baseline chosen as the superset of the per-host configs:
.zshrc (agnoster + kubectl), identical .vimrc, standard .bashrc, fuller
htoprc, and the shared neofetch config.

install.sh now deploys servers/ unconditionally (no hostname matching);
removed the --host flag. README updated accordingly.

README.md

@@ -2,45 +2,54 @@
 
 Personal and server dotfiles. Kept in two areas:
 
-- `server/` — configs pulled from the homelab servers (iris, vega, nebula, nexus)
-- (personal dotfiles live at the repo root, kept separate from `server/`)
+- `servers/` — a single, generic set of server dotfiles (zsh, vim, bash,
+  htop, neofetch) applied to any homelab server, rather than one folder per host
+- (personal dotfiles live at the repo root, kept separate from `servers/`)
 
 ## Layout
 
 ```
-server/<host>/
-  .zshrc                      zsh config (oh-my-zsh, agnoster theme)
+servers/
+  .zshrc                      zsh config (oh-my-zsh, agnoster theme, kubectl plugin)
   .vimrc                      vim config (dracula + lightline + Vundle)
-  .bashrc                     bash config (where present)
+  .bashrc                     bash config (standard Debian default)
   .config/htop/htoprc         htop config
-  .config/neofetch/config.conf neofetch config (where present)
+  .config/neofetch/config.conf neofetch config
 ```
 
+These are the common baseline shared across the homelab hosts (iris, vega,
+nebula, nexus, ...). They were consolidated from the per-host configs into one
+generic set so a single `./install.sh` works on any server.
+
 ## What is NOT included (and why)
 
 These are intentionally excluded from the repo:
 
 - `.ssh/`, `.kube/`, `.docker/`, `.ansible/` — secrets / infra credentials
 - `.zsh_history`, `.viminfo`, `.zcompdump*`, `.netrwhist` — ephemeral caches
-- `.oh-my-zsh/` — upstream framework (25–32M); reinstall instead of vendoring
+- `.oh-my-zsh/` — upstream framework; reinstall instead of vendoring
 - `.vim/bundle/*` — Vundle-managed third-party plugins
 - `backup.sh`, `clean.sh`, `crontab.bak*`, `talosctl`, `places` — local utility
   scripts / binaries specific to each host
 
-## Reinstalling the frameworks on a fresh server
+## Installing on a fresh server
 
 ```sh
-# oh-my-zsh (theme used: agnoster)
-sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
-
-# zsh-autosuggestions plugin
-git clone https://github.com/zsh-users/zsh-autosuggestions \
-  ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-autosuggestions
-
-# vim plugins (dracula, lightline, vim-gitbranch) via Vundle
-git clone https://github.com/VundleVim/Vundle.vim.git ~/.vim/bundle/Vundle.vim
-vim +PluginInstall +qall
+git clone git@git.ivanch.me:ivanch/dotfiles.git
+cd dotfiles
+./install.sh            # detects Debian/Alpine, installs pkgs + oh-my-zsh,
+                        # deploys servers/ and installs Vim plugins
+# optional: ./install.sh --chsh   (set login shell to zsh)
+#           ./install.sh --dry-run (preview only)
 ```
 
-After cloning `server/<host>/` contents into `/root`, source `.zshrc` (or
-re-login) and run `:PluginInstall` once in vim.
+The installer:
+
+1. Detects the OS / package manager (`apt` on Debian, `apk` on Alpine) and
+   installs `git curl zsh vim` plus `htop` and `fzf`.
+2. Installs oh-my-zsh (unattended) + the `zsh-autosuggestions` plugin.
+3. Copies the `servers/` dotfiles into `$HOME`.
+4. Clones the Vim plugins declared in `.vimrc` (dracula, lightline,
+   vim-gitbranch) directly — no interactive step required.
+
+It is safe to re-run; every step is idempotent.