tui.class.sgr
tui.class.sgr CLASS [STATE]
Resolves a theme class into an escape prefix, without a subshell.
Sets: TUI_SGR, plus TUI_FG, TUI_BG, TUI_MODS.
Example
tui.class.sgr nav_link focus
printf '%s text%s' "$TUI_SGR" "$TUI_RESET"
