* feat: generate fields validation and use it when issuing requests to API with soft (default) or hard modes
* chore: apply linter fixes
* feat: enable field validation on int fields
* feat: add validation for ^[\w]+$ fields
* feat: add validation for MAC address fields
* fix: trim wrappers for all comments
* feat: add validation for IPv4, IPv6 and IP(IPv4/IPv6) fields
* feat: add validation for numeric, non-zero based fields
* fix: one of validation can contain dot (.) sign in values
* feat: add second notation of MAC address validation
* fix: one of validation can start with ^( and end with )$
* feat: add option to disable validation and use soft validation by default
* chore: fix test
* docs: add readme about client-side validation
This commit changes the code generator to generate a `UnmarshalJSON` for each
struct, so that if unmarshalled it properly handles UniFis varying integer values
via the `emptyStringInt` type.
Structs not including a field of `int` type will still have the function generated,
but it will effectively do nothing.
Fixes#18
