Add delete to EventRepository

[sebdeveloper6952]

This PR adds a delete method to the EventRepository interface. An implementation of the method is also provided on EventRepositorySqlite.

Addresses #18

[sebdeveloper6952]

@CodyTseng I repeated a lot of code here, I will improve it, just wanted to get the PR going. I think the find and delete methods could share the filtering logic and we could extract that into its own function that returns an object like:

{
  innerJoinClauses: [],
  whereClauses: [],
  whereValues: []
}

[CodyTseng]

Sounds good!

[sebdeveloper6952]

Hi @CodyTseng, what do you think of this so far?

[CodyTseng]

Hi @CodyTseng, what do you think of this so far?

It seems like the tag filtering condition is ineffective 🤔

[sebdeveloper6952]

Hi @CodyTseng, what do you think of this so far?

It seems like the tag filtering condition is ineffective 🤔

I'll check that out and also provide test cases in this PR.

[CodyTseng]

I'll check that out and also provide test cases in this PR.

No hurry, take your time 🤗