Add --help, --version, and TTY detection to CLI#119
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Running dippy with no stdin no longer hangs — it detects the TTY and prints a hint. --help/-h shows usage, --version/-V prints the version. All checked before reading stdin. Closes #100
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Summary
dippy --help/-h— shows usage, mode flags, and available optionsdippy --version/-V— prints version for bug reportsAll flags are early exits checked before
json.load(sys.stdin).Closes #100