Make `org-zk-collections` defcustom

[alex-rozenshteyn-leapyear]

After loading the package, trying to do some things (like org-zk-new-file) results in an error:

Debugger entered--Lisp error: (void-variable org-zk-collections)
  org-zk-select-collection(#f(compiled-function (c) #<bytecode 0x46a71a9d>))
  org-zk-new-file()
  ...

M-x describe-variable has nothing to say about org-zk-collections

I prefer to use the customize interface rather than setq, and I think good variable descriptions are important for usability; both could be accomplished by using defcustom

[l3kn]

Hi Alex,

I've started refactoring code & fixing / improving the documentation, that's going to take a few more days / weeks.

I'm also not sure what the scope of this project should be, considering the great work being done on https://github.com/jethrokuan/org-roam/

For now, it's best to treat the code here as a complicated emacs configuration.