Support more conditions in Repository

[f3l1x]

In almost every searching I use LIKE. At this moment I have to do that in mapper. =/

[hrach]

Thins need a deeper implementatio of filtering feature to allow such filtering also in ArrayCollection.

[hrach]

Custom functions merged: https://github.com/nextras/orm/commit/8bea3f4cf5da754260a9f5806259d50153af1207

Like custom function:

• impl: https://github.com/nextras/orm/blob/8bea3f4cf5da754260a9f5806259d50153af1207/tests/inc/model/LikeFilterFunction.php
• registration: https://github.com/nextras/orm/blob/8bea3f4cf5da754260a9f5806259d50153af1207/tests/inc/model/book/BooksRepository.php#L40-L41
• usage: https://github.com/nextras/orm/blob/8bea3f4cf5da754260a9f5806259d50153af1207/tests/cases/integration/Collection/collection.customFunctions.phpt#L31-L32

Docs will be updated later.

[camohub]

This LIKE syntax looks little weird. It does not seem like books->findBy(['title~=' => 'Some title']) Is not possible to write it better?