feat: add errorz package to combine errors as enum in there

[nedimakar]

I just created an errorz package that will contain errors enum so we can use them multiple time and change them in one place.

I was thinking about adding couple of helper functions but I don't know that much the requirements of project. But place is ready to write sth.

[bmo-at-a9s]

I added a branch with some suggestions, you can have a look at them here 8c42502
and incorparate them in your code as you see fit.
As discussed with MF on friday, I used a sligtly more discriptive module name and would suggest you do the same here.
If you have questions, I am available

[nedimakar]

@bmo-at-a9s I check you suggestions and I think your suggestion totally makes sense to me so no objection. I guess we can merge your changes into this branch.

[nedimakar]

I added a branch with some suggestions, you can have a look at them here 8c42502 and incorparate them in your code as you see fit. As discussed with MF on friday, I used a sligtly more discriptive module name and would suggest you do the same here. If you have questions, I am available

I test your suggestions but are you sure that this changes pass tests?

Expected: (*errors.errorString){s:"Error trying to get current database version: error"}
Actual:   (*fmt.wrapError){msg:"pgsql_goosedb: error trying to get current database version: error", err:(*errors.errorString){s:"error"}}
  (Should equal)!

[bmo-at-a9s]

I added a branch with some suggestions, you can have a look at them here 8c42502 and incorparate them in your code as you see fit. As discussed with MF on friday, I used a sligtly more discriptive module name and would suggest you do the same here. If you have questions, I am available

I test your suggestions but are you sure that this changes pass tests?

Expected: (*errors.errorString){s:"Error trying to get current database version: error"}
Actual:   (*fmt.wrapError){msg:"pgsql_goosedb: error trying to get current database version: error", err:(*errors.errorString){s:"error"}}
  (Should equal)!

Yeah, the test case needed to be adjusted for this to work with our new dynamic helper error.
I fixed it real quick, other than that it looks good to me! Thank you for this