Some generic exceptions refactored into custom and specific exceptions

[mykolasglinskis]

No description provided.

[knocte]

Thanks for your contribution! You don't need the $ character of strings because you're not using string interpolation in them. If you remove that I'll merge this patch.

[knocte]

(PS: You don't need to close this PR and open a new one to be able to make changes.)

[mykolasglinskis]

removed interpolation

[knocte]

Your last commit is introducing unnecessary diff noise, did you change the line endings or something?

[knocte]

hello?

[knocte]

@mykolasglinskis ping?

[dev-masih]

@knocte so the original poster wont answer anymore so i propose to close this PR and i Open another with the same changes so PR can merge into project. what do you think?

[knocte]

@masihakbari yeah sure, we can close this one when you have opened a new one.