add support for default flag

[sicknarlo]

This is a first go at adding support for some sort of default configuration.

This will allow users to create a configuration array either in the package.json or as an rc file, which looks like this:

crcf: [ "typescript" ] 

Then any new commands with the -default flag will automatically include any options in the array, along with any added options provided.

For example, with the above configuration the command npx crcf src/component/FooComponent --default will create tsx files. You can combine this with other flags too, i.e. npx crcf src/component/FooComponent -dufs

[sicknarlo]

cc @snaerth

[snaerth]

@sicknarlo Sorry for the delay. I will look over this in the coming week. This is a great feature :) thank you

[snaerth]

The feature has been added. Thanks for your support.