feat: configurable zoom limits

[MightyCoderX]

• constants to define default zoom min, max, and speed values
• use logarithms to adapt to any MIN/MAX_ZOOM values automatically
• cli args to configure zoom min, max and speed
• update help message accordingly

[MightyCoderX]

I know there are a lot of unwraps there but I'm not too good with rust, if you could suggest me what the proper way to replace that unwrap with a safe handling I'll do that ASAP

[coffeeispower]

You should probably handle those errors because they are parse errors and it will panic if you pass something that is not a number. Javascript would return you NaN when you do Number.parse(), but in rust it returns you a proper Result::Err that you can easily handle