`zip` command should take an array of files

[TwitchBronBron]

The zip command currently only zips a directory. However, for many devs, the whole concept of "stagingDir" is confusing, and typically unnecessary. I propose the following expected behaviors for zip:

• it should accept a dir arg, which is a folder where you want to zip the files from. (i believe this is the existing behavior)
• it should accept a standard rokudeploy files array, and these would be resolved with the roku-deploy algorithm. The files are read from disk and immediately written into the zip without ever being copied into a staging directory.

Some examples:

npx roku-deploy zip --dir ./dist --out myApp.zip
npx roku-deploy zip --files "source/**/*" "components/**/*" fonts/**/* --out myApp.zip

This should apply to the cli, the commands, and the rokuDeploy.zip() function call.