feat: implement deletion via Facebook activity log

[SaptakS]

@redshiftzero this is the work I had done. Will need a lot of cleanup and testing and also write functions for other parts apart from post. Let me know if some code doesn't make sense.

Closes #653

[redshiftzero]

Added a bunch here, I haven't updated the tests yet but I have things mostly working:

Except I get this while testing so FB is throttling deletions:

[redshiftzero]

A few more fun things:

• Delete buttons per activity log category vary ([Facebook] switch to Activity Log #653 (comment))
• Sometimes it may ask you for your password randomly, you can enable clicking and enter password to handle this

[redshiftzero]

After 40ceb21, I was able to delete all my FB data successfully using this approach. We need to ensure we have test data for each category we're deleting here and retest.

[redshiftzero]

Test Plan

Test Data

Here are the categories we need to test that can be tested individually (these I have tested):

• Posts, photos, and videos - I posted on my own timeline 1 text post, 1 photo post, 1 video post
• Comments - I commented on a friend's post
• Likes and reactions - I reacted/liked a friend's post
• Check-ins - I checked in at a location
• Your posts on other people's timelines - I posted on a friend's timeline and in a group

Things that we need our friends help testing (these I have not tested):

• Other people's posts on your timeline
• Photos and videos you're tagged in
• Posts you're tagged in

Main test process

1. Ensure you select all categories:

2. Confirm for each data type it deletes the item.

Misc tests

Here are other things I checked:

• I also re-ran with all categories to check idempotency, and all good.
• I also checked just deleting a single category (leaving the others unchecked) is all good.