Add [side] parameter for FormBuilderFilterChip and FormBuilderChoiceChip

[fatyga]

Copy [side] parameter from Material's ChoiceChip widget with documentation. Copy [side] parameter form Material's FilterChip widget.

Connection with issue(s)

Connected to #1328

Solution description

I copied parameter definition from FilterChip and ChoiceChip widgets. I also copied documentation only for FormBuilderChoiceChip, because FormBuilderFilterChip doesn't have documentation.

Screenshots or Videos

To Do

• Read contributing guide
• Check the original issue to confirm it is fully satisfied
• Add solution description to help guide reviewers
• Add unit test to verify new or fixed behaviour
• If apply, add documentation to code properties and package readme

[fatyga]

Hi, how long do I have to wait for approval?

[deandreamatias]

@fatyga what is the changes? Only see the updated example dependencies

[fatyga]

Sorry, I have forgotten to stage all files. I've fixed that.