Add neovim config, migrate tmux to vim-style bindings

- Add kickstart-based neovim config with catppuccin, telescope, LSP,
  treesitter, DAP, vimtex, harpoon, and lazygit integration
- Remap tmux pane navigation and splits to hjkl / s / v

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

laptop/.config/tmux/tmux.conf

@@ -1,36 +1,32 @@
-# tmux.conf — keybindings mirror emacs window/windmove conventions
+# tmux.conf — vim-style keybindings
 
-# Emacs-style splits (mirrors C-x 2 / C-x 3)
+# Splits
 unbind '"'
 unbind %
-bind 2 split-window -v -c "#{pane_current_path}"  # horizontal split (below)
-bind 3 split-window -h -c "#{pane_current_path}"  # vertical split (right)
+bind s split-window -v -c "#{pane_current_path}"
+bind v split-window -h -c "#{pane_current_path}"
 
-# Emacs-style close (mirrors C-x 0 / C-x 1)
-bind 0 kill-pane
-bind 1 kill-pane -a
+# Close
+bind x kill-pane
 
-# Emacs-style cycle (mirrors C-x o)
-bind o select-pane -t :.+
+# Pane navigation: prefix+hjkl and M-hjkl without prefix
+bind h select-pane -L
+bind j select-pane -D
+bind k select-pane -U
+bind l select-pane -R
 
-# Pane navigation: prefix+Arrow everywhere, M-S-Arrow without prefix
-bind Left  select-pane -L
-bind Right select-pane -R
-bind Up    select-pane -U
-bind Down  select-pane -D
+bind -n M-h select-pane -L
+bind -n M-j select-pane -D
+bind -n M-k select-pane -U
+bind -n M-l select-pane -R
 
-bind -n M-S-Left  select-pane -L
-bind -n M-S-Right select-pane -R
-bind -n M-S-Up    select-pane -U
-bind -n M-S-Down  select-pane -D
-
-# Copy mode with emacs keys
-set-window-option -g mode-keys emacs
+# Copy mode with vi keys
+set-window-option -g mode-keys vi
 
 # General
 set -g mouse on
 set -g history-limit 10000
-set -sg escape-time 0        # no delay for escape — important for emacs
+set -sg escape-time 0        # no delay for escape — important for vim
 set -g focus-events on
 set -g default-terminal "tmux-256color"
 set -as terminal-overrides ',*:Tc'  # true color passthrough