herdr: move config to prdlk/herdr external; document OSC 8 links

docs/chezmoi/externals-and-ignore.mdx

@@ -60,6 +60,7 @@ Per-app config repos, one file each in `.chezmoiexternals/<app>.toml`. Each is a
 | `yazi.toml` | `~/.config/yazi` | [prdlk/yazi](https://github.com/prdlk/yazi) |
 | `kitty.toml` | `~/.config/kitty` | [prdlk/kitty](https://github.com/prdlk/kitty) |
 | `ghostty.toml` | `~/.config/ghostty` | [prdlk/ghostty](https://github.com/prdlk/ghostty) |
+| `herdr.toml` | `~/.config/herdr` | [prdlk/herdr](https://github.com/prdlk/herdr) — `plugins/github/` (runtime plugin checkouts) is gitignored there |
 | `omarchy.toml` | `~/.config/omarchy` | [prdlk/omarchy](https://github.com/prdlk/omarchy) — `shell.json`, hooks, menu extensions, themed templates; git-installed themes/plugins are gitignored there and restored by its `install-extras` script, `calendars.json` is never committed |
 | `noctalia.toml` | `~/.config/noctalia` | [prdlk/noctalia](https://github.com/prdlk/noctalia) — hand-written `config.toml` (shell, screenshot folder, theme, plugins, night light, notifications, OSD, wallpaper), `bar.toml` (bar layout, per-monitor overrides, widgets), and `palettes/` (custom palette JSON); merged under the GUI's unmanaged `~/.local/state/noctalia/settings.toml`, which wins on conflicts; `plugins/` holds runtime state with embedded tokens and is gitignored there. Linux desktop/laptop roles only ([role gate](#chezmoiignore)) |
 

docs/chezmoi/index.mdx

@@ -55,7 +55,6 @@ The repo is a [chezmoi](https://chezmoi.io) source directory. It lives at `~/.lo
   - gh/
   - gh-dash/
   - ghostty/
-  - herdr/
   - herdr-nvim/
   - hunk/
   - hypr/
@@ -107,7 +106,7 @@ chezmoi encodes target names and attributes in source file names. These are the
 | `private_` | Target has group/world permissions cleared (`0600`/`0700`) | `dot_config/atuin/private_config.toml`, `dot_config/gh/private_config.yml`, `dot_config/hunk/private_state.json` |
 | `executable_` | Target gets the executable bit | 44 files: every script in `dot_local/bin/` (including `executable_tmux-niri-title`) and `dot_config/niri/scripts/` |
 | `exact_` | Directory is exact: entries in the target that are not in the source are deleted | `dot_config/niri/exact_config.d/` (numbered `10-…kdl` through `95-…kdl` fragments) |
-| `empty_` | File is kept even when empty | `dot_config/herdr/empty_dot_plugins.lock` |
+| `empty_` | File is kept even when empty | None currently |
 | `symlink_` | Target is a symlink; file content is the link destination | None currently |
 | `.tmpl` | Rendered with Go templates and chezmoi data | `dot_gitconfig.tmpl`, `dot_config/shell/aliases.sh.tmpl`, all scripts, the config and ignore files |
 | `run_once_` / `run_onchange_` + `before_` / `after_` | Script, with run frequency and phase | See [Apply scripts](/chezmoi/scripts) |