Ship herdr alongside tmux (#6406)

* Ship herdr with a config that mirrors our tmux setup

Installs herdr through the mise shim, ships the matching config as an
Omarchy default, and adds the usual refresh/restart pair. The keybindings
map tmux sessions to workspaces, windows to tabs, and keep both the prefix
and direct bindings from config/tmux/tmux.conf.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* Add herdr versions of the tmux dev layout functions

hdl, hds, hdlm, and hsl drive herdr through its socket API instead of
tmux. hsl tiles into a real grid since herdr has no select-layout tiled.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* Namespace the herdr layout helpers so they stay out of the shell

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* Create hdlm's tabs in its own workspace instead of the focused one

herdr tab create follows the focused workspace without --workspace, so
switching workspaces while hdlm loops scatters the new tabs.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* Lay hsl's grid out in visual order

Splitting the first column repeatedly inserted each new column between it
and the previous one, so uneven counts put the spare row in a middle
column instead of the last.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* Report herdr config reload failures instead of swallowing them

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* Hide herdr's pane scrollbars to match tmux

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* Escape queued herdr layout commands

* Install herdr from the omarchy-herdr package instead of mise

* Use native herdr resize keybindings for tmux-style pane resizing

* Rename the omarchy-herdr package to herdr

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

config/herdr/config.toml

@@ -0,0 +1,82 @@
+# Mirrors the Omarchy tmux config in config/tmux/tmux.conf
+# tmux session -> herdr workspace, tmux window -> herdr tab, tmux pane -> herdr pane
+
+[theme]
+# tmux ran on the terminal's own palette (bg=default, fg=default, ANSI blue accents)
+name = "terminal"
+
+[theme.custom]
+# The active tab is drawn as panel_bg text on an accent background, so panel_bg
+# has to be dark for it to read - same colors as status-left's "#[fg=black,bg=blue]"
+panel_bg = "black"
+
+[terminal]
+# Matches -c "#{pane_current_path}" on every split, window, and session
+new_cwd = "follow"
+
+[keys]
+prefix = "ctrl+space"
+
+# Config and help
+reload_config = "prefix+q"
+help = "prefix+?"
+detach = "prefix+d"
+
+# Copy mode
+copy_mode = "prefix+["
+
+# Panes
+split_horizontal = ["prefix+h", "alt+enter"]
+split_vertical = ["prefix+v", "alt+shift+enter"]
+close_pane = ["prefix+x", "alt+esc"]
+zoom = "prefix+z"
+last_pane = "prefix+;"
+
+focus_pane_left = "ctrl+alt+left"
+focus_pane_down = "ctrl+alt+down"
+focus_pane_up = "ctrl+alt+up"
+focus_pane_right = "ctrl+alt+right"
+
+resize_mode = ["prefix+ctrl+left", "prefix+ctrl+down", "prefix+ctrl+up", "prefix+ctrl+right"]
+
+# Like resize-pane on C-M-S-arrows
+resize_pane_left = "ctrl+alt+shift+left"
+resize_pane_down = "ctrl+alt+shift+down"
+resize_pane_up = "ctrl+alt+shift+up"
+resize_pane_right = "ctrl+alt+shift+right"
+
+# No tmux equivalent; herdr's default prefix+shift+p is taken by previous session
+rename_pane = "prefix+shift+o"
+
+# Windows -> tabs
+new_tab = "prefix+c"
+rename_tab = "prefix+r"
+close_tab = "prefix+k"
+switch_tab = ["prefix+1..9", "alt+1..9"]
+previous_tab = ["prefix+p", "alt+left"]
+next_tab = ["prefix+n", "alt+right"]
+
+# Sessions -> workspaces
+new_workspace = "prefix+shift+c"
+rename_workspace = "prefix+shift+r"
+close_workspace = "prefix+shift+k"
+previous_workspace = ["prefix+shift+p", "alt+up"]
+next_workspace = ["prefix+shift+n", "alt+down"]
+
+[ui]
+accent = "blue"
+
+# tmux drew single-line dividers between adjacent panes
+pane_gaps = false
+
+# tmux had no scrollbar column beside its panes
+pane_scrollbars = false
+
+# kill-window and kill-session never asked
+confirm_close = false
+
+# automatic-rename gave windows a name without prompting
+prompt_new_tab_name = false
+
+# set -g mouse on
+mouse_capture = true