Add word-wise Ctrl+Arrow and Alt+Backspace support #79
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Hi,
readlinealready supports word-wise movement and deletion via Alt+Arrow/ Alt+f/ Alt+b/ Ctrl+w, though many terminals send different escape sequences for the same intent. So users often get "move/delete by word" in their shell, but not in programs using this library (e.g., VictoriaMetrics/VictoriaLogs#108).This change makes
readlinemore forgiving about what terminals send, without changing the exported API or higher‑level behavior:ESC+Backspace/ESC+DELtoMetaBackspacesoAlt+Backspacedeletes the previous word.3,5, and7in cursor sequences (e.g.ESC[1;5D/ESC[1;5C) as "word-wise" arrows, same asAlt+Left/Right(MetaBackward/MetaForward).Please review. Thank you!