Use when the user wants a dark Windows-style theme in the omp CLI (Oh My Pi coding agent TUI) — "change the theme in omp cli", "dark theme like on windows", "windows terminal", "One Half Dark", "omp theme", "dark theme in omp", "config.yml theme.dark", or omp shows the default "titanium" theme. Creates a custom One Half Dark theme for omp (~/.omp/agent/themes/), enables it via theme.dark in ~/.omp/agent/config.yml, and fixes the missing PATH for the omp binary (~/.bun/bin/omp).
