Git-secret: Feature: support long options

[joshrabinowitz]

It would be nice if git-secret supported short and long command-line options, such as --verbose instead of -v and --preserve instead of -P.

Support for long-form command line options also makes code and examples using git-secret more self-documenting.

Implementation details aside, I think this is a feature we should add. Any thoughts from users or developers are welcome.

[joshrabinowitz]

See also #390, #395

[sobolevn]

I agree, since there are a lot of options it may be more friendly to have long alternatives.

[joshrabinowitz]

It would be great for someone to make a first pass at defining a long option version of each option we support now. Hint hint to anyone : ]