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/path.zsh

@@ -0,0 +1,18 @@
+# PATH modifications
+# Auto-loaded by oh-my-zsh from $ZSH_CUSTOM/
+
+# Go
+export GOPATH="$HOME/go"
+export PATH="$HOME/go/bin:$PATH"
+
+# Local bin
+export PATH="$HOME/.local/bin:$PATH"
+
+# JDK (if installed)
+[[ -d /opt/jdk-12.0.1/bin ]] && export PATH="/opt/jdk-12.0.1/bin:$PATH"
+
+# Krew (kubectl plugin manager)
+export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"
+
+# Add custom zsh functions
+fpath+=~/.zfunc