Add a type to StepsStyles

[code-arman]

Right now, StepsStyles is exported as type any which makes it difficult to extend styles in typscript.

Here is what the steps.theme.ts file looks like with the current non-typed StepsStyles

[jeanverster]

Hey @code-arman, apologies for the delay here, but I've since updated the documentation on how to add custom styles.. It was getting a bit unwieldy to manage all the different parts, so I decided to rather add classes to all the different parts of the component so you can easily select and style them where required. Can have a look at them here along with an example.

Lemme know if this helps