Refactor dotfiles - 2026-01-18

Changes:
- Refactored .zshrc into modular oh-my-zsh/custom/ files
- Created aliases.zsh, functions.zsh, path.zsh, keybindings.zsh
- Added bira-time.zsh-theme (bira with timestamp)
- Added tools/*.zsh for pyenv, nvm, kubectl
- Updated .tmux.conf.local with cross-platform support
- Updated gpakosz/.tmux framework
- Cleaned up .zshenv

dot_oh-my-zsh/custom/keybindings.zsh

@@ -0,0 +1,13 @@
+# Key bindings
+# Auto-loaded by oh-my-zsh from $ZSH_CUSTOM/
+
+# Enable Ctrl-x-e to edit command line in $EDITOR
+autoload -U edit-command-line
+zle -N edit-command-line
+bindkey '^xe' edit-command-line
+bindkey '^x^e' edit-command-line
+
+# Zsh autosuggestions (if plugin is installed)
+ZSH_AUTOSUGGEST_STRATEGY=(history completion)
+bindkey '^[0' autosuggest-accept
+bindkey '^[9' autosuggest-fetch