Command-line entry point for the units calculator.

Supports both interactive (REPL) mode and single-expression evaluation. Can be built as an escript via mix escript.build.

Usage

# Interactive mode
unity

# Single expression
unity "3 meters to feet"

# Two-argument conversion (GNU units style)
unity "3 meters" "feet"

# With options
unity -v "1 gallon" "liters"
unity -t "100 celsius" "fahrenheit"
unity --locale de "1234.5 meter to kilometer"