refactor: make gem errors inherit from base classes

[matteoredz]

The new error hierarchy would look like this:

ItaxCode::Error
└── ItaxCode::Encoder::Error
    └── ItaxCode::Encoder::SomeError
└── ItaxCode::Parser::Error
    └── ItaxCode::Parser::SomeError
└── ...

[blocknotes]

Thank you for the fast PR 💪
It seems good!

Just a minor thing: https://github.com/matteoredz/itax-code/pull/37/files#diff-91365432354c46335ab8560b08d3f5f1821e48a7e0fa021a543fef528fe01d68R7
Error = Class.new(Error) <= this point may seem unclear - perhaps Error = Class.new(ItaxCode::Error) ?

BTW, it does the job 😁

[matteoredz]

Thank you for the fast PR 💪 It seems good!

Just a minor thing: https://github.com/matteoredz/itax-code/pull/37/files#diff-91365432354c46335ab8560b08d3f5f1821e48a7e0fa021a543fef528fe01d68R7 Error = Class.new(Error) <= this point may seem unclear - perhaps Error = Class.new(ItaxCode::Error) ?

BTW, it does the job 😁

Np 😃 It's indeed using the module scope to access the outer ItaxCode::Error class. I'd avoid the prefix as it's unnecessary in this case.