feat(form-field) Added generator for name, val, id, checked fields

[adinvadim]

No description provided.

[awinogradov]

Ok, @adinvadim where generators are? ;)

[adinvadim]

@awinogradov Hi!) Sory for this pause.

This PR not solve all ideas from issue, It's just a generation attributes in accordance with the documentation of bem-components. They had been generating in part, for example field name had not been generating for select and input control, but for other had.

Also I added val and checked field generator.

Generator val attribute for checkbox-group and radio-group control
ad0e8ba#diff-e2b97f1f2974e5ec768fa481baca3aafR5

Generator id, val, checked for checkbox and radio
ad0e8ba#diff-cb9d04658ffd846a61f6b100030bf141R5

Generator val, name, id for input control
Generator name, val for select
Generator val for textarea

[adinvadim]

Conflicts...

[awinogradov]

@adinvadim I believe, you can solve them all ;)